Carbon Black

1. Increase the proportion of carbon black in the material.
2. Reduce the particle size.

Dear Sir,

Thanx for your valued comment , I know as we decrease particle size surface area increases an it gives better blackness , but as particle size is decreased carbon becomes light in weight and fly loss is more , as we do mixing in open rolls .

I am well aware of all grades of carbon black but price is a factor too as in our country competetion is very high , may be you can give some other advice.

Dear sir,

If u want to improve the properties of CB you can try the suggestion below:

1. U can increase the CB loading on ur compound..but it have limitation that if the loading to much it will drop the properties of ur product

2. U can use the CB with small grade N330...this particle about several nanomicro...so this particle will have high surface surface area n give high properties...

3. You can use hybrid filler if u consider the cost

For ur information..usually pigment used as colourant for ur product... some process..maybe u can use any treatment to improve the properties of CB

Carbon Black pigments come in a veriety of particle size and surface treatments. Some CB has a yellowish undertone, some has a blue undertone. Surface treatments may be added, for instance a surfactant treatment for use in water base paints.

You can try shifting the undertones by adding yellow or blue pigments but it is not easy. Sometimes an addition of black iron oxide will help.

Contacting the pigment supplier can be helpful.

Carbon black pigments are the deepest blacks in the market, but for a proper color development is imperative to mill them. This process has to be made with proper dispersing additives and resin binders. There are many grades available but the best are the ones with high specific surface and high oil absorption values. However, if milled pigment is not black enough for your purposes, in some applications blackness can be improved by adding black dye.

RMP

The "blackest" carbon black is the soot obtained by dry distillation of bamboo.

Contact one of the pigment manufacturers who supply pigments to the paint companies. Start with Google for Pigment Suppliers.

Make a masterbatch with high content of very fine carbon black,

perhaps N550 or 600, then add portions of this into your regular process. This will minimize your loss of CB.

It will also be easier to mantain an even quality.

There are too many variables regarding the CB topic, I suggest visiting Shepherd Color Company (based in Cincinnati, Ohio) at www.shepherdcolor.com. They are the world's largest family-owned pigment manufacturer and they have an excellent tech staff to help you.

Dear Rajesh,

You have not mentioned the Product Type in which you are using C-black i.e.A Plastic article, A Paint or Coating Film ,Rubber etc.

There are few suggestions you can weigh them to your best :

(1) Increase the % Proportion of C-black grade you are using to the maximum possible

in your Formulation.

(2) Change over to very fine and High Jet Black Grades ,like FW200 of DEGUSSA.

(3) Try and use some effective Dispersing and Wetting Agents and make sure you are using the pigment grade to the maximum - possible extent to develop the jet blackness .

Many times it is observed that a bad formula can waste the BEST of the grades , if correct grade and or dosage of additive is not selected carefully.

(4) Equipments and Machines used by you for mixing and or Dispersing the Black Pigment in to your system also plays important role. Please look at them and make sure you are using the correct procedure and conditions to develop Jet blackness to the maximum extent.

Please try these options.

PANKAJ VYAS