Concentrates, pigments

Membrane-retained components are collectively called concentrate or retentate. Materials permeating the membrane are called filtrate, ultrafiltrate, or permeate. It is the objective of ultrafiltration to recover or concentrate particular species in the retentate (eg, latex concentration, pigment recovery, protein recovery from cheese and casein wheys, and concentration of proteins for biopharmaceuticals) or to produce a purified permeate (eg, sewage treatment, production of sterile water or antibiotics, etc). Diafiltration is a specific ultrafiltration process in which the retentate is further purified or the permeable sohds are extracted further by the addition of water or, in the case of proteins, buffer to the retentate. 

For comparison with other plant samples, take 0.05 or 0.1 ml of this concentrated pigment extract, dilute to 5 ml with 100% acetone or diethyl ether, and determine the amount of photosynthetic pigments using the absorption coefficients and equations given in UNITF4.3. 

The relative case of compounding thermoset and thermoplastic liquid formulation allows a great deal of flexibility in fine tuning the material to the requirements of the part. By changing variables such as filter type and level, blowing agent concentration, pigment, and catalyst the properties of the plastic can be optimized for the specific application. 

Wax Concentrates. Pigments and/or additives are dispersed in wax by a melting process. 

Masterbatches highly concentrated pigment and additive preparations for technical plastics, spin dying and packaging ... 

RPCH is not known to have any true metabolic effect in crustaceans, however, RPCH can (of course) elicit most of the actions of the insect AKHs in the appropriate insect recipient. Likewise, insect AKHs are potent to concentrate pigments in the appropriate crustacean species but to date, no report has shown that AKH can effect a colour change in insects. 

Texter, J., Electroacoustic characterization of electrokinetics in concentrated pigment dispersions 3-methyl-1-(4-carboxyphenyl)-2-pyrazolin-5-one monomethineoxonol, Langmuir, 8, 291-298 (1992). 

Dry color v. Term used loosely to describe dry colored pigments. A concentrated pigment... 

The final paint is often made by blending colour solutions, but frequently a more stable dispersion is obtained if all the pigments are dispersed simultaneously in the same mill. This is called co-grinding the pigments. If the colour is then slightly off shade, it is adjusted by additions of colour solutions or concentrated pigment dispersions. 

Concentrates or masterbatches are consistent, simple, and safe. They usually come in a granular form, in which the concentrated pigment is dispersed in a polymer carrier (such as polyethylene) that is compatible with the matrix resin. The let-down ratio is usually 0.5-2%, depending on colour, host material, and part thickness. 

New in the Microlen range are high-concentration pigment preparations based on polyolefins, giving good dispersion and suitability for automatic metering for masterbatch production, compounds, and colouring of elastomers. 

Suggested Use DISPERSE-AYD 15 should be used to make highly concentrated pigment dispersions which can either be let down directly into finished coatings or converted into stable, non-flaking tinting pastes for both in-plant and machine tinting. Specifications ... 

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