Easy to use , competitive prices ,stable quality, short lead time,good adherence,smooth surface without bubbles, acid-resistance

Code:  B-317

Product Name:  Pre-grinding powder for acid resist opaque enamel

1,Material Ratio in Grinding:

Pre-grinding Powder:  100

Clay:  7

Bentonite:  0.3

Borax:  0.2

                       Sodium Nitrite:  0.2

Trisodium Phosphate:  0.2

Black PigmentT5-11:  4.0    In all: 110.5

Water:  50-55

   B-318 should be grinded with another 0.3% bluish green pigment.

2,Specification:

These products are used as one-coat enamel on surface of cast iron wares, cooker and stoves. B-317 and 318 are matt black glaze; B-319 is forged black glaze which could form delicate coating. In order to achieve proper gloss, firing temperature and time should be controlled very well in firing.

3,Indexes and Parameter:

Firing Temperature: 750-760°C;Coating:  smooth and delicateGloss: standard≤±5Acid-resistance: ≥A levelFineness:  8-30 mesh, there will be 15-20g residue by sieving 100g such

        powder through a 100-mesh sieve.

Adherence:  The cast iron turn to be dark brown when the coating is chipped     

           off.

                 

4,Usage:

Mill the pre-grinding powder and water to 1-1.5g/100ml 150 mesh.; Push them through a 80-mesh sieve and keep the consistency at 165~170g/100ml, (1.65~1.70g/cm3); Cover 120-160 micron such product on the thick cast iron at 750-760°C. Firing temperature and time should be controlled very well to obtain a proper gloss. 

Pre-grinding powder for acid resist opaque enamel for cookware B-317