This listing is for a set of brand new, precision-cut acrylic felt slider dust protectors (also known as dust shields, dust curtains, or gaskets) for a Roland CompuRhythm CR-78 drum machine, to replace the old ones that are prone to crumbling apart. The set includes all of the dust protectors needed to replace those used by all of the sliders and switches on the CR-78.
These slider gaskets are made to exact specifications on a professional laser cutter out of 1.5mm stiffened and resin-bonded black acrylic felt which does not shed fibers like other forms of felt. The laser melts the cut edge as it cuts each slit or hole, effectively cauterizing it so even on these edges there are no loose fibers to fall into the slider opening.
Here’s some more information about the material used to make these.
The material we use is a different material from the originals and it is true that it will feel different. We tested 6 different gasket materials before we chose this material, which consist of acrylic fibers bonded together with an acrylic polymer resin. It is flexible but will not shed: you can rub it with your hand and no fibers at all come off, even if your hand is wet.
Why use acrylic felt instead of just using the EVA foam material that Roland originally used? We briefly considered offering an EVA option but decided against it because there seemed to be no good reason to knowingly make a product that would suffer the same fate as the original sets in a couple decades. We aim to improve on the shortcomings of any synth’s original construction, design and materials wherever we can. In contrast to EVA, acrylic polymers, as long as they show mechanical stability (e.g., no loose fibers) will offer great chemical stability. As a vintage clothing and jewelry dealer in a past venture I encountered 60+ year old acrylic fiber garments and resin objects (this is what Lucite is) whose properties remain unchanged from the time that they were manufactured.