shall do that. Having a bugger of a time. 3M were no help. Thought that
cube corner prisms were ordinarily big and was following the terminology
most used by traffic sign, safety clothes and retroreflective tape
manufacturers. Seems also that some of the retroreflective technology is
film or sheet based.
I recall there's an array of cube corner prisms on the moon that lasers
on earth shoot at.
If I were a manufacturer of these basic retroreflective particles, I
would NOT sell them to the public, but restrict the sales to more or
less reputable manufacturing outfits.
It is amazing what the bad publicity from ordinary idiotic DIY buyers
can do to your economic future.
By the way. Why did you think that the prisms would be better for your
Uncle Al some interesting info there, thanks.
Jbuch, you haven't added any knowledge only opinion.
There's a few assumptions there; direct sales for non-listed product, no
I expect not-legal issues/safety/cost of processing order etc; Bulk
sales for established product vs samples - 'back in the old days'
companies would be helpful, especially for school projects and start-up
exploratory initiatives - ways to improve community profile; Some things
start small - nothing to suggest not reputable; Referral to third party
agent is an option; Referral to existing products that may be adaptable
- basic sales/liason skills.
It is amazing that large companies have such poor liaison
skills/personnel. An assumption there re: idiocy. I don't think such
large companies economic future is influence by such 'bad publicity'
especially in light of larger economic issues or environmental issues.
I'm not sure they would be, but I would like to find out. It comes down
to matters of directionality/scattering and orientation of prisms vs
spheres. What do you know?
I researched this about 4 years ago, and was told that generally
speaking, 3M restricts the sale of their retroreflective media to
"qualified" purchasers...... You may still be able to buy some from
specialty outlets who have managed to acquire stock.
Not all applications are best served by the highest directionality
Perfect directionality would mean that because the automobile headlight
hits the retroreflective media at a different angle than the line of
sight of the driver's eyes, then the product would perform poorly as a
"be seen" aid.
I would not sell to you as an individual, if I were in control of
manufacturing these materials, because you haven't done your homework.
The sales of microprism retroreflectors are much smaller than
microspheres such as what 3M sells.
I have quite a few articles of both of these media, and for my
interests, the microprism is wanting.
I suggest that you buy some commerical products of each and become
familiar with their strengths and limitations yourself.
And do the actual research, quite a bit of which can be done online. The
telephone can get you an awful lot of inside information from
We're done, I think.
Yes, and there's the surface coating and imperfections in that and the
RI differential with encapsulating substance/surface coating.
Retro-reflected luminance of 60% or so is claimed by one product
manufacturer for their sheets. There are quite a few patents for sheet
prism tech but I am yet to find anyone who produces loose true micro
cube corners - 50-1500 micron of either internal reflection or silvered
type. Of course with sheet prisms there isn't the difficulty of
positioning but at the expense of limited conformability.
In my wanderings I re-discovered the fact that Stanley Kubrick shot The
Dawn of Man scene in 2001 against a retro-reflective screen using a
special projection camera.
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