Colorants and base resins - mixing

[mwohlg]

Hi all,

I have one project that uses a Schulman natural nylon 6,6 (GF50) with a blue and a gray variant. I have another project that uses a DSM natural nylon 4,6 (GF30) with a green and a tan variant. The blue and gray colorants are from a different supplier than the green and tan colorants.

If my second project's customer wants to get a third version of their part in gray, can I use the gray colorant that is intended for the PA66GF50, or do I have to get a gray colorant that is especially intended/formulated for the PA46GF30? (In case it matters, the green and tan colorants are in nylon 6 carriers, but I don't know what the carrier of the blue and gray colorants is.)

Thanks!