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Apr 11

Mountmaking Forum ›Oddy testing on FOSSHAPE BLACK 400


Brian Jeffrey 7/24/18

As you are probably aware, both the standard FOSSHAPE 300 (300 gram per sq. meter)  and heavier weight FOSSHAPE 600  both pass oddy testing.   Does anyone have oddy test results on the FOSSHAPE BLACK 400  or perhaps know whether or not it has been tested??  Brian Jeffrey www.fosshape.com



PJ Grimm



My textile conservator has told me in the past… if it has been dyed black it will not pass oddy testing. The only way we were able to use black here has been in open air temporary displays.

It’s a rule that has stuck here. I would like to know the results if someone does test this.


PJ Grimm


pj.grimm@cincyart.org | 513-639-2010

953 Eden Park Drive | Cincinnati, OH 45202




Brian Jeffrey


Yes, thanks makes sense to me, but FOSSHAPE BLACK 400  is not a stock dyed material.  Neither the synthetic fiber utilized in the composition or the finished fabric has been dyed.  There is not post treatment involved changing white to black.  The staple fibers utilized for the mechanical entanglement/nonwoven manufacturing process are “solution dyed”.    Old textile speak here, but t’s kind of like a radish and a carrot…..so if you look at the cross section of a radish and a carrot, the radish is red on the outside, but white on the inside, whereas the carrot is orange throughout.   The fibers used in the construction of FOSSHAPE BLACK 400  are the black throughout and produced that way during the fiber extrusion process and not  white fibers or a white fabric than has been dyed black.

Brian Jeffrey


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