What are the technical parameters of water based pigment dispersion?

As a water-based pigment dispersion user, how to choose suitable pigment dispersion products? 

Firstly, the working system compatibility is the first to be confirmed. Water based pigment dispersion is suitable for using in water based resin system, different pigment dispersions must be match with compatible water based working systems.

One simple compatible testing of pigment dispersion and water based resin system: put about water based pigment dispersion by 1% amount into water based resin system. After several mintues stirring, if mixed liquid is uniformly distributed, no bigger particles appear and no layered, and still no abnormal after storing for 24hours, we can judge they are good compatible. If particle aggregation and uneven happened, we can know they are bad compatible. For example, Caison NL series water based pigment dispersion is suitable for water-based acrylic resin system and aqueous epoxy resin bicomponent system, but Caison CTH series pigment dispersion is not good for this water based epoxy resin system.

Secondly, pigment dispersion technical parameters must be considered. Such as PH value, pigment content, solid content, brightness, high temperature resistance, sunlight fastness, acid & alkali resistant, weather fastness, migration resistant and so on.  The PH value of pigment dispersion will be decided by pigment paste formulation system, and pigment dispersion PH value will affect the operation effect.So we should be pay attention to the pigment dispersion PH value during the using process. Caison water based pigment disperisons have different series for different applications, and these different series pigment dispersion would have different technical parameters, you can learn more from our official website.

Thirdly, it is the safe indicators of water based pigment dispersion. When customers choose water based pigment dispersion to coloring or tinting some materials, and final products produced by these colored matrerials should be required to conform to industrial product safe standards, such as formaldehyde content control, heavy metals content control, aromatic amine content control and plasticizer content control. These safe performance data must be learned clearly before choosing suitable pigment dispersion. 

For example, Shanghai Caison CTH series eco-friendly water based pigment dispersion is mainly used for textile screen printing or dyeing. According to the textile industry standards, when our pigment dispersion is used by less than 10% amount, it conforms to the five safe standards of Oeko-Tex100:2015 for adult underwear direct touching with skin grade:

Formaldehyde <75PPM;

Heavy metal:  Sb <30PPM, As <1PPM, Cd <0.1PPM, Hg <0.02PPM, Cu <50PPM,  Cr <2PPM, Cr (VI) <0.5PPM, Co < 4PPM, Pb <1PPM;

Phthalates: <1000PPM;

APEO <100PPM;

24 aromatic amines <20 PPM;

Fourthly, pigment disperison stability, the prodcut service whether meets customer needs.

Summary: when customer chooses water based pigment disperison, please don't only take care the prices of pigment dispersion, but also pay more attention to the quality of pigment dispersion and their actual technical parameters, then to confirm if they are what you demand.