Homebrew PCBs

I think that there are many forms of Dextrin. The Pulsar paper is
"amylose" type Dextrin, but from the 'net it seems that there are
several variables which govern the nature of a specific batch of
Dextrin, such as length of polymer chains, viscosity, etc. As John
Kleinbauer noted it's how you work the dough (for pizza).

Finding the right amylose dextrin/process is probably one part of a
solution.

Paper makers use a machine called a "calender" which has rollers to
smooth the paper. The Pulsar paper looks like the surface had some
texture which has been smoothed out, but only somewhat, like the
"moutain peaks" have been flattened, smoothed, and shiney, while the
valleys retain some roughness and are not as shiny and smooth.

So perhaps paper texture and how to smooth it are also important.

The closest thing to the Pulsar paper in terms of "feel" I have
experienced is brown paper tape. When you get the gum side wet is is
slippery, and if you feel it, a bit "slimey". Seems like that might be
closer to the kind of dextrin required.

Time to go work on a PCB.

Grant

--- In Homebrew_PCBs@yahoogroups.com, "Norman Stewart"
<normstewart@a...> wrote:
> Haven't tried this, but would spraying the paper (any paper) with
laundry
> spray starch give a usable surface?  Since the iodine test indicates a
> starch (dextrin?), just might be similar enough. And would prepasted
> wallpaper, which you said has a dextrin content, work - printing on the
> paste side?
> Just a couple of late night thoughts while reading the e-mails.
> 
> Norm.