That's what I've been trying to find out. It supposedly is spun polyester Pellon. Whether it's 100% or a blend with other materials, I don't know. 

I took an RTI roll into a fabric store last night, and they were stumped (after the "What the hell do you want with THAT?" looks I got). But it appears that it may be most similar to Pellon #810 (Tru-Grid tracing cloths, 100% polyester) or #830 (Easy Pattern tracing cloths, 70% polyester/30% Rayon). But they come in yard boards, not rolls. Not very helpful. 

Microfiber cloths would seem hugely expensive for the rate we go through them in cleaning our machines. 

Thanks for everyone's replies. 


Does anyone know what is the material that the RTI rolls for their tapechek
line are made from?
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On Fri, Oct 19, 2018 at 11:52 PM Eli Bildirici <
[log in to unmask]> wrote:

> Somewhat off-topic, but - has anybody tried using microfiber cloths? Does
> it make any sense to use them?
> -------- Original Message --------
> From: Jeff Willens <[log in to unmask]>
> Sent: Thursday, October 18, 2018 04:07 PM
> To: [log in to unmask]
> Subject: [ARSCLIST] Pellon questions
> >
> > Trying to source some 1" Pellon rolls for tape cleaning. Cannot find it
> anywhere for a reasonable price (like, less than $4 for a tiny spool). But
> actually what I wanted to know is:
> >
> > - What is the actual Pellon model number of the type we would normally
> use for tape cleaning? I have a lead on Pellon #910 as being the one that
> fits the bill, but I'm not sure.
> >
> > - Would this be considered "stabilizer" in the fabric world? There are
> so many different kinds of Pellon and most of it is useless for our
> purposes. It would help to know what to ask for specifically.
> >
> > - The type we have is about 2 mils thick.
> >
> > Of course, if anyone has a vendor for this, we'd be much obliged...
> >
> > TIA,
> > Jeff
> >