Question:
What is a decal?
Applying
Place one decal at a time in warm water in a container large enough to allow the decal to be flat. A decal will curl up in the water. In about 15 seconds, check to see if the decal has started to release from the backing paper. If not, allow it to soak until it does start to release, but do not allow the decal to slide off the backing paper into the water. Remove the decal from the water and place it on paper toweling until it flattens again. Make sure the area where the decal will be applied has been cleaned with a damp paper towel. With the backing paper still attached, place the decal into position, face up. Hold the decal in place and gently slide out the backing paper. Use a decal squeegee to gently work out air bubbles from under the decal. Always work from the center toward the edges. Allow the item to dry for 24 hours, then fire it to the recommended temperature. This is usually cone 015-016 for china paint or metallic decals, and cone 022 for glass decals.
Firing/Venting
Firing Decals
A decal isn't fired that much differently than any other piece of ware, although there are some special considerations. Venting is very important to good results with decals - especially to get true colours.
Problems related to venting include: poor colour development, a cloudy or hazy appearance. Proper heatwork is also an important factor. Decals that are under or overfired may exibit the following: faded colours (overfired), colour shift (underfired), decals rub off (underfired), dull appearing metallics (underfired)
Decals for glass
Decal Firing Tips
Decals offer an opportunity to add decoration to ceramic and glass ware without the time and skill required for hand painting. When properly applied and fired, decals can add colour, texture, design and personalization to a piece. To achieve professional results with decals, it's important to understand how to select, apply and fire the decals.
Troubleshooting
Any problems incurred when working with decals are usually due to poor application technique. Remember the following:
• Always wipe the item down with a damp cloth
• Use clean, warm water to soak decals
• Squeegee the item well to remove all air bubbles and to ensure good adhesion
• Dry the item 24 hours before firing
Although rare, firing problems can usually be solved by re-firing the item one cone hotter and making sure there is adequate air circulation within the kiln.
Bad decals are extremely rare. They may have been contaminated during the printing process, there may be a compatibility problem between the decal and the glaze, or the covercoat may be too heavy or too thin.
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| Guru Spotlight |
| Patricia Walters-Fischer |
