iSis thickness limit?

[howardm]

For those of you who actually have/use an iSis unit, the spec sheet says that the
max media thickness is 0.45mm (17.7mil).  How 'true' is that and what has
been your experience w/ thicker papers (VFA, cold press, etc) and even thinner
canvas.

Merry Christmas!

[rxchaos]

I use an i1iSis_XL and find it is rather fussy with the media thickness limits.  I've not been able to feed Hahnemuhle PhotoRag papers (thickness .48mm) through it. The thinnest paper I've used is Hahnemuhle Rice (thickness 0.15mm) and it feeds without any trouble.

-c

[howardm]

So you punt and use a i1Pro or something else on the thicker papers?

Really sort of a shame the limit precludes many of the rag/textured papers

[Rhossydd]

I've got an isis and it will measure Photo rag without any complaint. The paper measures at 0.5 mm for the last sheet that went through.

[howardm]

Interesting data point.  I wonder if it's manufacturing tolerance or firmware or something else.

I guess I'll have to wait for it to arrive and see.

I wonder if the old 'use a thinner leader strip' trick would work.

[Doug Gray]

The maximum I've put through an I1iSis XL 2 is .46mm, matte. It requires just a bit of pressure to initially feed which was noted in something that came with the instrument. However, MK inks tend to smear a bit on the rollers. The problem is worse on .46 mm paper than .32 mm paper (210 gsm). And it depends on the printer ink. My 9500 II is much worse than the 9800. The MK carbon particles are not well bound to the paper and some adhere to the rubber rollers which strongly press into the paper in order to advance the paper accurately during scanning.  I have a special image format routine which sets the patches so that the tread smears, which are very narrow, occur at/near the patch edges. This gets good readings but I still have to clean the rollers afterwards or residual MK ink will leave marks on the next few papers.