Commitment to Service

For close to half a century, JAMES M. BROWN LTD has been on the leading edge of cadmium pigment production technology. Through an ongoing commitment to research excellence and strenuous adherence to the most rigorous quality standards, JMB maintains its position at the technological forefront, and consistently produces some of the finest cadmium pigments available anywhere.

JMB pigments are produced under a quality system conforming to ISO 9001 (2000), certificate number FM1510.

JMB Cadium Pigments Web Page

 
UNITED MINERAL & CHEMICAL is the sole U.S. representative for JMB and has been involved in the marketing and sales of quality pigments for thirty-five years. The combined production and marketing experience resulting from the association with JMB, together with the outstanding quality of the product, enables UMC to provide continuously reliable service to the U.S. color industry and to consistently meet stringent industry demands for precise formulations, immediate delivery, and competitive pricing.

In recent years, the plastics industry has become a major consumer of cadmium pigments. We are committed to this market, as well as to more traditional users in paints, coatings, ceramics and artists colors. Our long term commitments are demonstrated by the fact that since 1980, JMB has not only doubled the size of its facility but is also one of the very few manufacturers left in the industry.
We intended to continue this growth, so that we can go on providing the consistently high level of quality and service the industry has come to expect from UNITED MINERAL & CHEMICAL.

General properties

1.RANGE OF COLORS
James M. Brown manufactures a complete range of cadmium pigments from a greenish yellow through orange and red to deep maroon. As well as offering a range of standard pigments on its shade card, JMB offers a matching service against pigments which customers may already be using.

Please contact UMC to receive Color Chart by Mail.

2.HEAT RESISTANCE
Because these pigments have a very stable crystal structure, being produced themselves at very high temperatures, they do not discolor when subjected to temperatures normally used for processing baking enamels and thermoplastic/ thermosetpolymers (abt. 450°C)

3. RESISTANCE TO CHEMICAL ATTACK
JMB Cadmium Pigments are absolutely insoluble in water, organic solvents, and plasticizers. They therefore do not mitigate  from products in which they are incorporated due to solvent attack. They are also completely resistant to attack by alkalis, hydrogen sulfide, dilute mineral acids, and organic acids

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4. RESISTANCE TO DEGRADATION BY LIGHT
These pigments have excellent light fastness, exhibiting a 7 on the wool scale for Yellows and an 8 for Oranges and Reds. The pigments are not fast to the  combined effects of strong light, atmospheric water vapor and oxygen.

5. OPACITY
The opacity of these pigments is considerably higher than all organic alternatives and those of comparable brilliance. As a result, these cadmium pigments offer a solution to coloring problems in which it is considered undesirable to incorporate large amounts of a white opacifier. For this reason, they can be used in conjunction with organic pigments.

6.UNIFORMITY OF DISPERSION
An average particle size distribution curve indicates 80% of particles are below 5 microns. This uniformity ensures consistent performance in standard operations. In general, JMB pigments disperse well for all usual purposes and are offered without any surface treatment , though such treatments are available if required.

7.SCREENING
All JMB pigments are screened through a 350 mesh screen and are magnetically sieved before they are passed for distribution.

8.SAFETY
JMB cadium pigments conform to the most exacting requirements for the coloring of plastics, in artists' colors and in ceramics.  Tests have demonstrated that plastics pigmented with up to 1% if these materials should easily meet the requirements of the European Standard EN 71 part 3 on toy safety.  They are manufactured using very high purity raw materials and all undergo an acid-washing treatment which enables them easily to comply with the 0.01 % Cd (soluble in M/10 hydrochloric acid) which was adopted for pigments for food-contact use in the Council of Europe's resolution AP 89(1). A "normal" result on a JMB pigment would be < 0.001 % and results are often obtained which are below the method detection limit. (With flameless AA, it would be possible to detect levels lower than 0.0005 % Cd, but the method refers only to normal "flame" AA.  The European Union has recently carried out a thorough cradle-to-grave risk assesment of cadmium pigments and has concluded that they offer no significant risk to man or to the environment.

JMB Information Sheet

9. COLOR INDEX NUMBERS
Color Index Numbers for Cadmium Pigments are as follows:
PY 35 Yellow Shades C.I. 77205
PY 20 Orange Shades C.I. 77202
PR108 Red Shades C.I. 77202

10.TYPES
Finally, all shades represented are available as a pure toner (absence of extender), or in reduced-strength form (presence of extender such as barium sulfate, etc.) and DYPOL dispersions, which are non-dusting forms of JMB cadmium pigments.