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Best way to paint a whole concave clear glass?

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Best way to paint a whole concave clear glass?

Postby Wanderer » Thu Sep 01, 2011 10:34 pm

Hello,

I have a quick question to ask. We are developing the mould for a new transparent concave glass in China. The glass will be transparent but would like to turn it all-white, except for a small vertical strip on one side that will remain clear / transparent. So far our feedback shows that white cannot be applied all over the bottle with screen printing.

I was wondering if you know of any alternative and affordable ways to achieve this (for a quantity of 3,000 - 5,000 bottles)?

Thank you very much in advance.

Ares
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Re: Best way to paint a whole concave clear glass?

Postby tompaine » Fri Sep 02, 2011 6:17 pm

Wanderer wrote:Hello,

I have a quick question to ask. We are developing the mould for a new transparent concave glass in China. The glass will be transparent but would like to turn it all-white, except for a small vertical strip on one side that will remain clear / transparent. So far our feedback shows that white cannot be applied all over the bottle with screen printing.

I was wondering if you know of any alternative and affordable ways to achieve this (for a quantity of 3,000 - 5,000 bottles)?

Thank you very much in advance.

Ares

Depends on the shape, you could screenprint a mask over the clear area, then dip-coat the glass. Pictures might help.
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Re: Best way to paint a whole concave clear glass?

Postby Wanderer » Fri Sep 02, 2011 7:16 pm

Thanks so much tompaine!

Here's a pic of the shape of the bottle: http://www.flickr.com/photos/eclecticon ... 7412282658

And here is a diagram of the basic processing we need, turn it all white (from clear) but leave a slim vertical strip transparent: http://www.flickr.com/photos/eclecticon ... 7140783712

The factory mentioned spray painting, would that be a better option?

Thanks in advance for any further input.
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Re: Best way to paint a whole concave clear glass?

Postby tompaine » Sat Sep 03, 2011 5:15 am

Spraying works, imagine putting a piece of tape down the side & peeling it off to reveal the clear line.
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Re: Best way to paint a whole concave clear glass?

Postby Wanderer » Sun Sep 04, 2011 7:35 pm

Thanks so much tompaine!
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Re: Best way to paint a whole concave clear glass?

Postby Wanderer » Sun Sep 04, 2011 8:02 pm

tompaine, this is a different subject and I'm still not sure whether I should start a new topic on it..

Someone mentioned that the bottle would need to have "registration" at the bottom in order to be able to screen-print on it (this refers to the graphics we'll be adding later with screen printing). The graphics will have two colors (gray and lime-green). I'm not sure what this "registration" is and how this should affect our mould..

Any input would be greatly appreciated, thank you so much once again.
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Re: Best way to paint a whole concave clear glass?

Postby tompaine » Mon Sep 05, 2011 3:25 am

If you want to align the screenprinting process twice - for two colours then you need a datum point on the glass, it's often an indent, otherwise how do you know where to print the second colour?
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Re: Best way to paint a whole concave clear glass?

Postby Wanderer » Tue Sep 06, 2011 10:04 pm

Tons of thanks tompaine, your comments have solved my most serious queries!
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Re: Best way to paint a whole concave clear glass?

Postby tompaine » Thu Sep 08, 2011 3:23 am

It's a pleasure
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Re: Best way to paint a whole concave clear glass?

Postby Wanderer » Mon Dec 05, 2011 10:34 am

Hi tompaine.

I wanted to ask for your help on a new set of problems that we ran into, in regards with what we were discussing in this post. I started a new topic here: viewtopic.php?f=3&t=2863

Any input would be really valuable. Thank you very much in advance.
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