| How to... Prepare dry glazes for application. |
When preparing a glaze for pouring, dipping or spraying
application, the addition of Bentonite is usually required to help
keep the glaze in suspension and increase the drying time. If the
glaze is to be used for brushing application, C.M.C. Powder and Bentonite
must be added. C.M.C. acts as a binder and allows the glaze to flow
smoothly.
The following instructions are intended only as a general guideline:
- For brushing only-Mix C.M.C. Powder (22 grams) with a small
amount of warm water (32 ozs.) and age for a day or two.
- Blend Bentonite into the dry glaze.
- Measure water into a clean plastic bucket of adequate size.
- Screen or sieve dry material slowly into the water while continuously
mixing. Scrape sides and bottom of bucket often and mix thoroughly.
- For brushing glaze add C.M.C./water solution and mix thoroughly.
(See No. 1 above)
- Check viscosity with a hydrometer. The hydrometer reading should
be approximately 55 for dipping color glazes, 46-47 for dipping
clear glazes, 60 for spraying and 60-65 for brushing.
- Glazes should be screened through the appropriate mesh to achieve
the results desired. (Typically, 30-80 mesh sieves.)
- Glazes are usually best when they have been mixed and allowed
to sit for a period of 24 hours before being remixed and then
applied.
|
Dry Glaze Mixing Chart
|
|
| Dipping Glaze |
|
1 lb. dry |
|
10 lbs. dry |
|
50 lbs. dry |
| Water |
|
10.5 to 11.5 oz |
|
105 to 115 oz |
|
4 gal 13 oz to 4 gal 63 oz |
| Bentonite |
|
0 to 2.3 g |
|
0 to 22.6 g |
|
0 to 114 g |
|
| Spraying Glaze* |
|
1 lb. dry |
|
10 lbs. dry |
|
50 lbs. dry |
| Water |
|
7.5 to 8.5 oz |
|
75 to 85 oz |
|
2 gal 119 oz to 3 gal 41 oz |
| Bentonite |
|
1.1 to 3.4 g |
|
11 to 34 g |
|
57 to 170 g |
|
| Brushing Glaze |
|
1 lb. dry |
|
10 lbs. dry |
|
50 lbs. dry |
| Water |
|
6.5 to 7.5 oz |
|
65 to 75 oz |
|
2 gal 69 oz to 3 gal 9 oz |
| Bentonite |
|
4.5 to 6.8 g |
|
45 to 68 g |
|
227 to 340 g |
| C.M.C. Powder |
|
2.3 to 3.4 g |
|
23 to 34 g |
|
114 to 170 g |
|
| * The use of a when spraying is highly recommended. |
|
Bulletin Board &