Re: [rp-ml] Zcorp binder

The powder is a proprietary gypsum and the binder is a proprietary
water, organics, biocides &? solution.

At 10:52 AM 6/28/2008, T. Joseph Mahaney wrote:
>What is in the binder and what is the powder?
>
>T. Joseph Mahaney
>Chemistry/Physical Science Instructional Technician
>Math/Science/Engineering Division
>Fresno City College
>1101 E. University Ave.
>Fresno, N-CA 93741, USA
>Office:(559)442-4600 ext 8397
>Cell:(714) 609-7954
>
>
>----- Original Message ----
>From: Stanley Lechtzin <stanley@comcast.net>
>To: Adrian Bowyer <A.Bowyer@bath.ac.uk>
>Cc: Steve Pinkston <SPinkston@essexind.com>; rp-ml@rapid.lpt.fi
>Sent: Friday, June 27, 2008 5:46:47 PM
>Subject: Re: [rp-ml] Zcorp binder
>
>I believe that Dr. Bowyer is confusing infiltrant with binder.
>Cyanoacrylate is one of many possible infiltrants used to post
>process Zcorp printed parts. The binders used in the printers are
>water soluble. Sorry, but I have not tried to add my own dyes to the
>clear binder, so no help here.
>
>
>At 04:40 PM 6/27/2008, Adrian Bowyer wrote:
>>Quoting Steve Pinkston <SPinkston@essexind.com>:
>>
>>>Has anyone experimented with using any other kind of dyes in a Zcorp
>>>printer other than the colored binders they sell? I would like to just
>>>make the binder tinted, not full color. This is useful if you need to
>>>align the print heads without replacing them. I have been thinning the
>>>color binder with clear at about a 10:1 ratio but my color is going to
>>>go out of date at this rate. It is also not very cost effective since
>>>the color binder is 60% more expensive than the clear.
>>
>>The binder is cyanoacrylate, so, whatever you do, don't get any water
>>or water-soluble dye near it (or anything else with hydroxide ions).
>>I would have thought oil-soluble dyes might work well. I'd look at
>>dyes intended for cooking and catering oils, and azo dyes like Sudan
>>II. Azo dyes have OH groups, of course, but they are covalently
>>bonded, so shouldn't cause trouble.
>>
>>If you get a powder dye, you'll have to be very careful that it's all
>>dissolved, or the residual powder will clog the print heads. I'd put
>>it through a filter paper just to be sure (again, making sure no
>>moisture gets to it). Watch out what the filter is made from -
>>cyanoacrylate reacts violently with cotton (and that means some
>>papers, too).
>>
>>Experiment with a few tubes of Super Glue before pouring the dye into
>>the machine...
>>
>>Best wishes
>>
>>Adrian
>>
>>Dr Adrian Bowyer
>><http://staff.bath.ac.uk/ensab>http://staff.bath.ac.uk/ensab
>>http://reprap.org
>Prof. Stanley Lechtzin
>Area Head
>Temple University, Tyler School of Art
>Metals/Jewelry/CAD-CAM
>7725 Penrose Ave.
>Elkins Park, PA 19027
>
>phone: 215-782-2863
>email: stanley@comcast.net

Prof. Stanley Lechtzin
Area Head
Temple University, Tyler School of Art
Metals/Jewelry/CAD-CAM
7725 Penrose Ave.
Elkins Park, PA 19027

phone: 215-782-2863
email: stanley@comcast.net
Received on Sat Jun 28 17:38:45 2008