Letter 2087

Sodium Chromate Tetrahydrate?

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Sodium Chromate Tetrahydrate- Na2CrO4:4H2O,

I have heard of this chemical being used as a chromate treatment on steel, followed by a Sodium Hydroxide dip and oven dry. Who can shed some light on this process?

Dave McKay Norman Noble, Inc. - Highland Hts, OH

Dear Sir,

I want steel gray colour coating on seed glass beads using the cool process of lusturing.

Kindly suggest the name of chemical for the purpose.

I will appreciate & awaiting for early response.

Jagdamba Prasad Chaturvedi
- Valsad, Gujarat, India

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