645 slide mounting

Hello All-

I've recently built up a Pentax 645n kit, including a Kindermann 6 x 6 projector, and from Ebay a number of 6 x 45 slide mounts. These are made of a white bristol board or some such and seem to have a dry adhesive on the inside of the mount as they would fold up.

Back in the day I can recall mounting 35mm slides in Kodak mounts which had an adhesive activated by the heat of an ordinary household iron.

Might these mounts work in the same way? I don't see any maker's name. Any suggestions about the heat to set on the iron? Given how hard it is to find 6 x 45 mounts I hesitate to experiment, although I will if I have to. From all I can find I'll have to mount any slides I take myself, since I haven't run across any processors who mount 120 slides, let alone 6 x 45.

Thanks!

As a followup while on a Google search for something else, I came across slidescribe.com They have a sizeable variety of archival slide mounts, of the fold over sort, some with adhesive, some without. Here is what they offer:

WHITE MOUNTS-with adhesive
Catalog# Format Image Opening Outside Size Packaging Price
XG-GM-W* 6 x 8cm 54 x 74 mm 3 -15/16" x 4- 15/16" 50/pkg $8.95 buy
XD-GM-W 6 x 9cm
(70 mm) 54 x 81 mm 3 -15/16" x 4- 15/16" 50/pkg $7.95 buy
XE-GJ-W 4" x 5" 3-9/16 x 4-9/16" 4 -15/16" x 7 50/pkg $11.95 buy
XO-GJ-W 6 x 12cm, PAN 2-1/8" x 4-7/16" 4-7/8" x 7-5/8" 25/pkg $11.95 buy
XH-GJ-W 35mm WideLux 22.5mm x 57mm 3-1/2" sq 25/pkg $5.95 buy

* for 70mm dupes enlarged from 6 x 4.5cm originals and for the 6 x 8cm Fuji camera
WHITE MOUNTS - currently without adhesive
XM-GN-W 35mm 22 x 34mm 2" x 2" 100/pkg $7.95 buy
XA-GM-W 6 x 4.5cm 53.5 x 41mm 2-3/4" sq 50/pkg $11.95 buy
XB-GM-W 6 x 6cm 54 x 54mm 3-1/2" sq 50/pkg $9.95 buy
XC-GM-W 6 x 7cm 54 x 68mm 3-1/2" sq 50/pkg $14.95 buy

BLACK MOUNTS
Catalog# Format Image Opening Outside Size Packaging Price
XG-GM-B* 6 x 8cm 54 x 74mm 3 -15/16" x 4- 15/16" 50/pkg $8.95 buy
XD-GM-B 6 x 9cm
(70 mm) 54 x 81mm 3 -15/16" x 4- 15/16" 50/pkg $7.95 buy
XE-GJ-B 4" x 5" 3-9/16 x 4-9/16" 4 -15/16" x 7 50/pkg $11.95 buy
XO-GJ-B 6 x 12cm PAN 2-1/8" x 4-7/16" 4-7/8" x 7-5/8" 25/pkg $11.95

buy
* for 70mm dupes enlarged from 6 x 4.5cm originals and for the 6 x 8 cm Fuji camera

I've ordered some for 645 slides, we'll see how they look.