Dear sir, I am trying to find a supplier of pigment for glass in the firing temp range of 700 to 800 degrees. I understand that this range is not usual but I fire in this range. With experimentation I have found some colours work some do not. Your 28000 series is of most interest to me. I would require samples of each colour to test before I buy. I will of course pay for samples.sincerely Sheryl Smith
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