Shellac Flakes Characteristics Quiz
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Questions and Answers

What is the main advantage of using shellac as a finish?

  • Long shelf life in liquid form
  • Quick drying time with minimal dust problems (correct)
  • High resistance to heat, water, and chemicals
  • Excellent wear resistance

    • What is the main disadvantage of shellac as a finish?

  • Weak resistance to heat, water, and chemicals (correct)
  • Excellent sealing properties
  • High resistance to heat, water, and chemicals
  • Long shelf life in liquid form

    • What happens if shellac is stale and not fresh?

  • It loses its rubbing properties
  • It retains its original properties
  • It dries hard due to esterification (correct)
  • It turns into a coalescing finish

    • Which test can be performed to check the freshness of liquid shellac?

    <p>Fingerprint test</p> Signup and view all the answers

    What is the rule of thumb for the shelf life of user-mixed liquid shellac?

    <p>6 months</p> Signup and view all the answers

    What is the traditional resin in the history of furniture finishing?

    <p>Tree sap</p> Signup and view all the answers

    Which type of finish is a varnish with lots of thinner known as?

    <p>Wiping Varnish</p> Signup and view all the answers

    What is the natural resin secreted by the lac beetle called?

    <p>Shellac</p> Signup and view all the answers

    Which type of finish cures and includes varnish with a lot of thinner?

    <p>Reactive finish</p> Signup and view all the answers

    What is a common issue associated with varnish due to its slow drying nature?

    <p>Dust contamination problems and runs/sags</p> Signup and view all the answers

    Which type of finish was traditionally used on quality furniture during the 19th and early 20th century?

    <p>Shellac</p> Signup and view all the answers

    What is a key characteristic of the French Polish finishing technique?

    <p>Involves applying many thin coats of shellac</p> Signup and view all the answers

    Which type of finish has limited working time and good repair qualities?

    <p>Brushing Lacquer</p> Signup and view all the answers

    What is a common characteristic of Coalescing Finishes using Waterborne Technology?

    <p>Water is the main solvent used</p> Signup and view all the answers

    Which type of varnish is less resistant to heat, chemicals, scratches, and water vapor?

    <p>Waterborne Varnish</p> Signup and view all the answers

    What happens when overworking an Evaporative Finish?

    <p>Redissolves the previous coat</p> Signup and view all the answers

    What is a key characteristic of Reactive Finish varnishes?

    <p>Do not affect the previous coat once cured</p> Signup and view all the answers

    Why should cooking oils not be used to protect wooden items?

    <p>Cooking oils may turn rancid, leading to a bad smell and taste.</p> Signup and view all the answers

    What is a common characteristic of mineral oil when used on cutting boards?

    <p>Does not go rancid when exposed to air.</p> Signup and view all the answers

    What is a practical limit to film thickness when applying film finishes?

    <p>It can lead to a lower level of protection from abrasion and scratches.</p> Signup and view all the answers

    What is a key advantage of using hardwax-oil as a finish?

    <p>A small amount goes a long way.</p> Signup and view all the answers

    Why is it important for some wooden items like cutting boards to have 'food safe' finishes?

    <p>To avoid contamination of food with harmful substances.</p> Signup and view all the answers

    How do film finishes differ from oil finishes in terms of hardness?

    <p>Film finishes cure harder than oil finishes and can be built up in layers.</p> Signup and view all the answers

    Which type of oil is extracted from nuts of the tung tree and is considered a 'drying oil'?

    <p>Tung oil</p> Signup and view all the answers

    What is the main concern when using linseed oil as a wood finish?

    <p>Yellowing over time</p> Signup and view all the answers

    Which type of oil finish can spontaneously combust if not handled properly?

    <p>Boiled linseed oil</p> Signup and view all the answers

    What is a common characteristic of polymerized oils used as a wood finish?

    <p>Thick viscosity</p> Signup and view all the answers

    Which type of oil finish provides limited protection against scratching and marking?

    <p>Boiled linseed oil</p> Signup and view all the answers

    What distinguishes Tung Oil Finish from Pure Tung Oil, as indicated in the text?

    <p>'Tung Oil Finish' has metallic driers added for faster curing</p> Signup and view all the answers

    What is one key difference between Double-Boiled Linseed Oil (DBLO) and Polymerized Linseed Oil?

    <p>DBLO contains chemicals to speed curing, while Polymerized Linseed Oil undergoes multi-step polymerization</p> Signup and view all the answers

    What distinguishes a Reactive finish from a Wax Finish?

    <p>Reactive finish is a blend of oil and varnish creating a thick oil, while Wax Finish is an evaporative finish</p> Signup and view all the answers

    How does applying an Evaporative Finish differ from applying Danish Oil?

    <p>Evaporative Finish involves wiping off all excess oil, while Danish Oil requires thick application</p> Signup and view all the answers

    What is one characteristic that makes Wax Finish less protective than Reactive finish?

    <p>Wax Finish provides minimal protection against heat, water, and scuffs</p> Signup and view all the answers

    What differentiates the cure time of Reactive finish from that of Wax Finish?

    <p>Reactive finish cures faster than Wax Finish</p> Signup and view all the answers

    Which feature makes Polymerized Tung Oil stand out from Double-Boiled Linseed Oil?

    <p>Polymerized Tung Oil has a lower gloss than Double-Boiled Linseed Oil</p> Signup and view all the answers

    What type of finish undergoes a chemical reaction and is generally irreversible by adding the original solvent back?

    <p>Reactive Finishes</p> Signup and view all the answers

    Which type of oil finish does not dry but cures through a chemical reaction upon exposure to oxygen or a catalyst?

    <p>Linseed Oil Finish</p> Signup and view all the answers

    What is the key difference between finishes that 'dry' and those that 'cure' according to the text?

    <p>Drying finishes are reversible, while curing finishes are irreversible</p> Signup and view all the answers

    Which type of finish partially redissolves the previous coat, forming a single layer upon solvent evaporation?

    <p>Evaporative Finish</p> Signup and view all the answers

    What happens if a reactive finish is applied on top of a previous coat that has fully cured?

    <p>The finish will sit on top of the cured coat</p> Signup and view all the answers

    What characteristic distinguishes the term 'Drying Oil' from its actual behavior?

    <p>'Drying Oils' actually cure instead of drying</p> Signup and view all the answers

    What is a common disadvantage of using modern resins such as alkyd, phenolic, or polyurethane?

    <p>Difficulty in achieving 'invisible' repairs</p> Signup and view all the answers

    What is a distinguishing feature of Shellac as a wood finish?

    <p>It is known for its naturally orange color</p> Signup and view all the answers

    What is a key advantage of Wiping Varnish as compared to other finishes?

    <p>Offers exceptional resistance to dust contamination</p> Signup and view all the answers

    Why can applying Reactive finish varnish be easier compared to other finishes?

    <p>It cures with a lot of thinner, making it easier to work with</p> Signup and view all the answers

    What distinguishes Tree Sap from modern resins like alkyd, phenolic, or polyurethane?

    <p>Tree Sap offers lower resistance to heat, wear, and water vapor</p> Signup and view all the answers

    What is a common challenge associated with the Slow drying nature of Varnish?

    <p>'Invisible' repairs are difficult due to slow drying</p> Signup and view all the answers

    What is a common advantage of using shellac as a finish?

    <p>Excellent sealing properties</p> Signup and view all the answers

    What is the main drawback of shellac as a finish?

    <p>Weak resistance to heat, water, and chemicals</p> Signup and view all the answers

    How can you test the freshness of user-mixed liquid shellac?

    <p>Preform 'Fingerprint Test'</p> Signup and view all the answers

    Why does stale shellac not dry hard?

    <p>Caused by 'esterification'</p> Signup and view all the answers

    What type of shellac has a very long shelf life?

    <p>'Solid form' shellac</p> Signup and view all the answers

    What distinguishes Penetrating Finishes from Film Finishes based on the text?

    <p>Penetrating finishes can be built up in layers while film finishes cannot.</p> Signup and view all the answers

    What is a key characteristic of Polymerized Tung Oil as mentioned in the text?

    <p>It can be built up in layers to almost any thickness.</p> Signup and view all the answers

    Which statement accurately describes the application process of Brush On finishes?

    <p>Brush On finishes are the fastest to apply among all types of finishes.</p> Signup and view all the answers

    Why does Linseed Oil fall under the category of Penetrating Finishes?

    <p>It soaks into the wood without building up or offering high protection.</p> Signup and view all the answers

    What is a characteristic feature of Waterborne varnish mentioned in the text?

    <p>It offers very low protection against scratching and marking.</p> Signup and view all the answers

    Which statement best describes the cleanup process after using Spray System finishes?

    <p>All parts must be thoroughly cleaned after use, making it the slowest cleanup method.</p> Signup and view all the answers

    What distinguishes Tung Oil from Linseed Oil in terms of yellowing over time?

    <p>Linseed oil yellows less than tung oil.</p> Signup and view all the answers

    What is a key characteristic of Boiled Linseed Oil (BLO) compared to Pure Linseed Oil?

    <p>BLO addresses the slow cure time associated with pure linseed oil.</p> Signup and view all the answers

    How does Polymerized Oil differ from traditional oils in terms of application thickness?

    <p>Polymerized oils should be applied thinly due to curing problems in thick layers.</p> Signup and view all the answers

    What is a risk associated with applying Wax Finish in thick layers?

    <p>Thick layers of wax finish may not cure properly.</p> Signup and view all the answers

    What is the primary purpose of adding metallic driers to Boiled Linseed Oil (BLO)?

    <p>To speed up the curing process of the oil.</p> Signup and view all the answers

    What could be a potential risk when using Linseed Oil on wooden surfaces?

    <p>'Drying oils' like linseed oil may not provide adequate protection against scratching.</p> Signup and view all the answers

    What differentiates Penetrating Finishes from Film Finishes in terms of building up layers?

    <p>Penetrating finishes can be built up in layers to any thickness while Film finishes cannot.</p> Signup and view all the answers

    Which type of finish offers the highest throughput according to the text?

    <p>Spray System</p> Signup and view all the answers

    What is a distinguishing feature of Oil Finishes compared to Film Finishes?

    <p>Oil finishes cure hard while Film finishes do not.</p> Signup and view all the answers

    Why is it important to have proper ventilation when using Spray On finishes?

    <p>To reduce exposure to harmful fumes and ensure safety.</p> Signup and view all the answers

    What characteristic distinguishes Drying oils from Non-Drying oils according to the text?

    <p>Drying oils plasticize the wood surface while Non-Drying oils do not.</p> Signup and view all the answers

    What is a key difference between Polymerized Linseed Oil and Double-Boiled Linseed Oil as mentioned in the text?

    <p>Polymerized Linseed Oil can build up in layers while Double-Boiled Linseed Oil cannot.</p> Signup and view all the answers

    What happens when crumpled up rags soaked with finish are not disposed of properly, as indicated in the text?

    <p>Thermal runaway can occur, leading to spontaneous combustion.</p> Signup and view all the answers

    In the context of curing finishes generating heat, what potential danger is highlighted in the text?

    <p>Uncontrolled heat generation can result in fire or spontaneous combustion.</p> Signup and view all the answers

    How does temperature impact the curing process of finishes, according to the text?

    <p>Higher temperatures result in faster curing.</p> Signup and view all the answers

    What role does insulation play in the context of curing finishes, as described in the text?

    <p>Insulation prevents heat from escaping quickly, creating a warm environment for faster curing.</p> Signup and view all the answers

    Why does fast curing, leading to more heat generation, pose a risk when finishing materials, based on the text?

    <p>Excessive heat can cause reactions that compromise the finish quality.</p> Signup and view all the answers

    What defines the term 'Drying Oil' as conflicting with the typical drying process of finishes?

    <p>It cures rather than dries upon application.</p> Signup and view all the answers

    What distinguishes finishes that 'Cure' from those that 'Dry' according to the text?

    <p>The initial drying followed by a curing chemical reaction process.</p> Signup and view all the answers

    Which type of finish would sit on top of previous coats only if the previous coat has fully cured?

    <p>Reactive finish</p> Signup and view all the answers

    What characteristic distinguishes Tung Oil from Linseed Oil in terms of final behavior?

    <p>Tung Oil does not dry but cures, unlike Linseed Oil.</p> Signup and view all the answers

    What makes Evaporative Finishes unique compared to other finish types?

    <p>They partially redissolve the previous coat forming a single layer.</p> Signup and view all the answers

    How do Reactive Finishes differ from Varnish Finishes in their application on top of previous coats?

    <p>Reactive Finishes only sit on top if the previous coat has fully cured, unlike Varnish Finishes.</p> Signup and view all the answers

    What is a key benefit of using Hardwax-Oil as a wood finish?

    <p>Popular for use on furniture due to its durability</p> Signup and view all the answers

    What is a common characteristic of Mineral Oil when applied to cutting boards and wooden utensils?

    <p>Does not go rancid when exposed to oxygen</p> Signup and view all the answers

    What distinguishes Film Finishes from Penetrating Finishes in terms of application?

    <p>Forming a thick coating on the wood surface</p> Signup and view all the answers

    Which characteristic is true about Varnish, excluding Waterborne Finishes?

    <p>Cures through a chemical reaction</p> Signup and view all the answers

    What is a risk associated with applying Film Finishes in excessive thickness?

    <p>May develop cracks due to wood expansion and contraction</p> Signup and view all the answers

    What is a distinguishing feature of Varnish, including Polyurethane but excluding Waterborne Finishes?

    <p>Forms a uniform layer on the wood surface</p> Signup and view all the answers

    What is a common issue associated with Slow drying nature of Varnish?

    <p>High risk of dust contamination</p> Signup and view all the answers

    What is a key downside of Shellac as mentioned in the text?

    <p>Difficult invisible repairs</p> Signup and view all the answers

    What makes Polymerized Tung Oil stand out from Double-Boiled Linseed Oil?

    <p>Increased hardness per coat</p> Signup and view all the answers

    Why is Shellac considered an Evaporative finish?

    <p>Dissolved in alcohol</p> Signup and view all the answers

    What is a significant drawback of Modern resins like alkyd, phenolic, or polyurethane?

    <p>Difficulty in rubbing out finishes</p> Signup and view all the answers

    Which characteristic of Tree sap as a tradition resin is NOT applicable to Modern resins like alkyd, phenolic, or polyurethane?

    <p>Yellowing over time</p> Signup and view all the answers

    Brushing Lacquer uses fast-evaporating solvents, unlike most lacquers that are sprayed.

    <p>False</p> Signup and view all the answers

    Waterborne Varnish has more working time compared to traditional varnishes.

    <p>False</p> Signup and view all the answers

    Shellac is a waterborne finish, containing glycol ether as a solvent.

    <p>False</p> Signup and view all the answers

    Waterborne Varnish dries slowly, allowing for easy brush marks avoidance during application.

    <p>False</p> Signup and view all the answers

    Reactive Finish varnishes can be overworked without causing problems due to their unique properties.

    <p>False</p> Signup and view all the answers

    Waterborne Technology finishes have a high resistance to heat, chemicals, and scratches.

    <p>False</p> Signup and view all the answers

    Linseed oil cures faster than Tung oil.

    <p>False</p> Signup and view all the answers

    Boiled Linseed Oil (BLO) actually contains boiled linseed.

    <p>False</p> Signup and view all the answers

    Polymerized oils have a low viscosity for easy application.

    <p>False</p> Signup and view all the answers

    Linseed oil provides better protection against scratching and marking than Tung oil.

    <p>False</p> Signup and view all the answers

    Applying thick layers of Polymerized Oils ensures proper curing.

    <p>False</p> Signup and view all the answers

    Linseed oil yellows less over time than Tung oil.

    <p>True</p> Signup and view all the answers

    Shellac is typically applied using a synthetic bristle brush.

    <p>False</p> Signup and view all the answers

    Modern resins like alkyd, phenolic, or polyurethane do not contain metallic dryers.

    <p>False</p> Signup and view all the answers

    Wiping varnish is a non-reactive finish that dries quickly without the need for thinning.

    <p>False</p> Signup and view all the answers

    Shellac is naturally orange-ish in color due to the inclusion of synthetic dyes.

    <p>False</p> Signup and view all the answers

    Tree sap as a traditional resin offers better chemical resistance compared to modern resins like alkyd, phenolic, or polyurethane.

    <p>False</p> Signup and view all the answers

    Applying shellac with a high quality natural bristle brush is a common technique used for quality furniture finishes in the modern era.

    <p>False</p> Signup and view all the answers

    Film finishes must be applied in an uneven layer to provide better protection from abrasion and scratches.

    <p>False</p> Signup and view all the answers

    Hardwax-Oil is a reactive finish that was originally developed for furniture use.

    <p>False</p> Signup and view all the answers

    Mineral oil is a drying oil that does not go rancid when exposed to oxygen.

    <p>False</p> Signup and view all the answers

    Varnish, excluding Waterborne Finishes, is a combination of oils, resins, and solvents.

    <p>True</p> Signup and view all the answers

    Shellac is a petroleum product that darkens the wood when applied.

    <p>False</p> Signup and view all the answers

    Polymerized Tung Oil provides minimal water protection compared to Double-Boiled Linseed Oil.

    <p>True</p> Signup and view all the answers

    Crumpled up rags soaked with finish can help the finish cure faster because heat cannot escape quickly.

    <p>True</p> Signup and view all the answers

    Spontaneous combustion can occur if finish-soaked materials are not disposed of properly.

    <p>True</p> Signup and view all the answers

    Higher temperatures lead to slower curing of finishes.

    <p>False</p> Signup and view all the answers

    Slow curing finishes generate more heat compared to fast curing finishes.

    <p>False</p> Signup and view all the answers

    Curing finishes create a warmer environment that can eventually lead to fire due to thermal runaway.

    <p>True</p> Signup and view all the answers

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