How to Achieve Maximum Transparency in Latex Coagulant Dipped Products

Manufacturer: We are manufacturing a wide range of latex dipped products using the coagulant dipping process with calcium nitrate. In one or two of our product range, we need to achieve maximum transparency in the final products. We have minimized or eliminated ZnO in our formulations but the degree of transparency still leaves something to be desired. Our prcess does not allow for straight dipping without coagulant.

We hope you could help us after viewing and studying our compound formulations.

John Woon (Senior Latex Consultant): Your formulations need some adjustment. Your choice of accelerators is wrong because different accelerates would have different solubility in the rubber and hence would affect the transparency of the rubber products. Three improved formulations which you can use have been sent to you separately.

You might also have to consider changing your coagulant because calcium nitrate would form rubber-insoluble salts/soaps and hence would reduce the transparency. One possible alternative is CHA (Cyclohexylammonium acetate) the by-products of which are more rubber soluble.

Successful Manufacture of Fabric-Lined Gloves

Manufacturer: We are manufacturing industrial supported gloves. Please explain the importance of coagulant and latex stability to ensure good quality gloves.

John Woon (Senior Latex Consultant): The strength of the coagulant (e.g. calcium nitrate) should be adjusted so that it is sufficiently strong to ensure adequate latex pick-up but not too strong that it prevents the penetration of the coagulant into the fabric otherwise the rubber to fabric adhesion would be poor.


The latex stability must be adjusted so as not to penetrate the fabric liner right through (i.e. strike through).

My detailed report on "Successful Manufacture of Fabric-Lined Gloves" has been sent to you separately.