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Art Clay™ Silver Overlay Paste

Handout #68-007-11

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[Characteristics]
Art Clay™ SILVER consists of pure silver powder, binding agent and water. The binding agent is produced from harmless pulp fiber. During firing, the pure silver powder solidifies. The binding agent consists of carbon, hydrogen and oxygen, resulting in the release of harmless carbon dioxide and steam during firing. Overlay Silver Paste is in a viscous, liquid form so that you can express 3-dimensional drawings on a surface of ceramic, porcelain or glass.

[Precautions]
Keep the clay indoors, out of direct sunlight.
Do NOT refrigerate. Use soon after opening.
When drying and baking, take care to prevent burns or fire. Ventilate your workroom well during firing.
Keep this product out of the reach of children.
If you get any of this product in your eyes or mouth, flush immediately with plenty of water and call your physician.
If skin irritation or itching occurs, wash with water and consult your doctor immediately.
Do not place a ceramic or porcelain piece applied with Overlay Silver Paste into a microwave oven.
It is important to follow the recommended instructions when using the Overlay Silver Paste to ensure a successful firing.

[Directions]

Preparation
Clean the surface of the ceramic or porcelain with alcohol or soap and water to remove dust or oil, which may interfere with the silver adhering to the surface.
Thin the paint with water to the consistency needed in order to paint the surface. (Recommended thickness is less than 0.5mm.) If the application is too thick, it may delaminate from the porcelain surface with the glaze after firing or by polishing.

Overlaying and drying
The applied paste must be completely dried before firing. It may be dried in the following ways:
Hair dryer: At least 10-15 minutes with 1200w hair dryer. Place the dryer within 15cm/6in. from the piece.
Food Dehydrator: At least 10 minutes at 60ºC /145ºF.
Oven: At least 7 minutes at 180ºC /330ºF.
Cooking plate: At least 7 minutes at 150-180ºC /300-330ºF.
Kiln: At least 7 minutes at 150ºC /300ºF.
Natural drying: At least 1 hour at room temperature.
Do not apply heat over 250ºC/480ºF, or the binder will burn away and shape of the layer may change.

Firing
To fire, place the piece in a cold or warm kiln (below 300ºC /572ºF). It is safest to start with a cold kiln. Take at least 15 minutes to reach firing temperature.
You must fire the piece with a programmable electric kiln, which is equipped with a temperature control.
Ramp the kiln to a temperature of 800ºC /1472ºF.
Ramping time varies by type and size of the kiln. Please refer to your kiln manual.
After reaching 800ºC /1472ºF, turn off the kiln and cool down to 100ºC/212ºF.
Take out the piece after kiln’s temperature drops down below 100ºC /212ºF.
Quickly cooling the piece, such as quenching, may cause it to break or crack.

Finishing
The surface of the fired piece will be white and matte due to crystallization of silver. But luster can be obtained by polishing (e.g. with stainless brush, burnisher, buff polishing, file, sandpaper).

Completing
The completed piece is pure silver (99.9%).


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