On Thu, 14 Nov 1996, Son Wei Meng wrote:
> I would like to ask if anyone have any information for any photopolymer
> which can be hardened by visible (red) light.
A lot of commonly used photopolymers can be cured using red light, if you
take the right photoinitiator (e.g. acrylate + eosin). According to the
red color of Quadrax parts, they probably used eosin as photoinitiator.
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