For more than 40 years, Mason Color has been a global supplier of high-performance pigments to all sectors of the ceramic industry. These include pigments for use in the manufacture and production of pottery, artware, bricks, sanitary ware and roofing materials.

CAN I MIX PIGMENTS TO MAKE MY OWN COLOUR PALETTE?

Yes, in most instances. However, some stains are incompatible with others. If you do not achieve the results you desire, please contact Mason Color at www.masoncolor.com/webform-176

WHY DO I NOT GET GOOD PINKS OR CRIMSONS AT CONE 06/2/5/10, ETC.?

Mason's Alpine Rose and Deep Crimson are stable from Cone 06 (normal "low" temperature) to Cone 12 (normal "high" temperature). This type of pigment requires the correct glaze chemistry, in all temperature ranges, in order to maximize the "colour value". High calcium content is the most important. The zinc and magnesia levels must be low to zero and boron should not be too high. These rules do not necessarily apply when "fast-firing" techniques are used. Also, these pigments need an oxidizing atmosphere throughout the firing cycle.

WHY IS MY PURPLE/LILAC/VIOLET GLAZE TURNING BLUE?

Some of these pigments are made of chrome-tin pink and cobalt. (See question above regarding pinks and crimsons). Sufficient calcium is needed to support the "red" side of the mixture.

WHEN I USE BLACK STAINS TO MAKE GREY SHADES THEY TURN GREEN/BROWN/BLUE/PINK ETC. WHY ARE THEY NOT SIMPLY GREY?

CERAMIC GLAZE STAIN WARNING INFORMATION
• Harmful if inhaled
• Causes eye irritation
• May cause skin Irritation
• Avoid breathing dust
• Avoid contact with eyes, skin, and clothing
• Keep container closed
• Use with adequate ventilation - Wear dust masks
• Wash thoroughly after handling
• Keep away from food
READ CURRENT G.H.S. SAFETY DATA SHEET IN DOCUMENTS SECTION

Do not use black stains to make grey shades by using small amounts in the glaze. Blacks are made of combinations of cobalt, iron, nickel, chromium, manganese, etc. If low percentages are used, the resulting colour is often that of the predominant oxide in any particular black pigment. Care should be taken to use the correct glaze chemistry to avoid combinations that create colour problems. It is better to use the grey pigments that we offer.

WHY DOES MY GREEN GLAZE TURN BROWN OR HAS BROWN EDGES?

Remove all zinc from your formula, as it will turn chromium brown in most situations. Additional calcium may help.

MY BLUE UNDER-GLAZE RUNS CREATING A "FUZZY" APPEARANCE. HOW CAN I PREVENT THIS?

Cobalt silicate is very soluble in the glaze. It is better to use cobalt aluminate or a combination of both. Also, too high of a temperature can cause this effect.

WHY DOES MY GLAZE APPEAR "MILKY"?

Too much boron in the frit or glaze formula, under-firing, or the presence of opacifier in amounts greater than 2%.

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