Crafting Resin and Polymer Clay 1 — Questions and Answers
Question 1: What are the two main components of epoxy resin?
- Resin and hardener (curing agent) (Correct answer)
- Resin and activator solvent
- Base resin and colorant
- Resin and catalyst powder
Correct answer: Resin and hardener (curing agent)
Epoxy resin requires mixing a resin part (Part A) with a hardener (Part B) in a precise ratio to trigger the chemical curing reaction.
Question 2: Why is it important to measure epoxy resin and hardener by volume or weight according to the manufacturer's ratio?
- An incorrect ratio prevents full curing, leaving a sticky, soft, or brittle result (Correct answer)
- An incorrect ratio only affects the color
- Too much hardener makes resin transparent
- The ratio only matters for thick pours
Correct answer: An incorrect ratio prevents full curing, leaving a sticky, soft, or brittle result
Epoxy curing is a chemical reaction requiring a specific stoichiometric balance; an off ratio means unreacted resin or hardener remains, preventing a fully cured, hard piece.
Question 3: What is 'polymer clay' made from?
- Polyvinyl chloride (PVC) particles in a plasticizer base that cures by baking in a home oven (Correct answer)
- Natural clay minerals and water
- Silicone and pigment
- Thermoplastic resin that melts at room temperature
Correct answer: Polyvinyl chloride (PVC) particles in a plasticizer base that cures by baking in a home oven
Polymer clay is a PVC-based modeling material that remains workable at room temperature and permanently hardens when baked at low oven temperatures (typically 275°F/130°C).
Question 4: What causes bubbles in cured epoxy resin, and how are they removed before curing?
- Air introduced during mixing; removed by gently passing a heat gun or torch flame over the surface (Correct answer)
- Moisture contamination; removed by refrigerating the resin
- Colorant separation; removed by stirring vigorously after pouring
- Hardener evaporation; unavoidable in thick pours
Correct answer: Air introduced during mixing; removed by gently passing a heat gun or torch flame over the surface
Stirring resin introduces air bubbles; a brief pass of heat from a torch or heat gun thins the surface tension so bubbles pop and release before the resin gels.
Question 5: What is 'conditioning' polymer clay before use?
- Warming and kneading the clay until it becomes soft, pliable, and free of cracks (Correct answer)
- Baking the clay at a low temperature before sculpting
- Adding liquid clay to soften an overly stiff block
- Storing the clay in the refrigerator to firm it up
Correct answer: Warming and kneading the clay until it becomes soft, pliable, and free of cracks
Conditioning works the plasticizer throughout the clay mass by repeatedly folding and pressing it until the texture is smooth and uniform, preventing cracks during shaping and baking.
Question 6: What is a 'silicone mold' primarily used for in resin crafting?
- Casting resin into shapes because cured resin releases easily from flexible silicone without adhesion (Correct answer)
- Mixing resin and hardener before pouring
- Measuring precise resin quantities
- Sanding and polishing cured resin pieces
Correct answer: Casting resin into shapes because cured resin releases easily from flexible silicone without adhesion
Silicone's non-stick properties mean cured epoxy resin doesn't adhere to it, allowing demolding without mold release agents or damage to the cast piece.
Crafting Resin and Polymer Clay 1
What are the two main components of epoxy resin?