914 Windshield inside OEM Glass Sticker logo?, Anyone making these OEM Windshield Mfg. Stickers Options

[TJB/914]

Looking for help if anyone makes these OEM Windshield Sticker's?
Are they different for every model year?
Many years ago while restoring my 914 I used a solvent to clean up the windshield glass & destroyed the letters. I would like one for my OEM original windshield (IMG:style_emoticons/default/pray.gif)
This is off as recent 1976 in a local shop for repairs in this photo.
Tom Michigan

[wonkipop]

alright @JeffBowlsby

i dug into heat protected glass this afternoon.
its not tint - here is the distinction.
@vitamin914 will correct me if i am way wrong.

tints work by cutting down in the visible spectrum of light.
this was incompatible with transparency standards at that time. 70%.
the glass itself was almost at the 70% all on its own before you even thought of tinting = no tinting. often even on side glass. at least not legally back then.

so they came up with heat absorbing glass.
which deals with light in the infrared spectrum but does not affect visible wavelengths.
so they could do heat control and still pass visibility/transparency regulation.

the modern form of one of these treatments or types of glass more properly is IRR
infra-red reflectance glass. it works just as the name suggests. reflects the heat spectrum and glass does not absorb it. its proper abbreviation is IRR.
sound familiar?

the earlier form was infra-red absorbent glass. IRA. not the irish republican army the nuns used to collect for. it didn't really work. it absorbs the infra-red before it hits the interior but it ends up heating the glass itself which then radiants into the interior.
they really don't use this one any more. but it was the tech back in the day with 914s and other 70s cars.

its pretty obvious which screens are the heat protected screens - they are the ones that have IRA in the description line after the makers name.

so i am going to have to go back to my original position which is i don't agree with you that F means tint. there was no tint glass in 914s from factory. only heat control.

i know that upsets the reasoning on the side glass, but there has to be some other meaning to the 1 or F or 1F code there.

also thanks to @vitamin914 's superb breakdown on glass for idiots like me, i can now understand what is going on with early cars referring to plate and later ones referring to F or as i believe F to mean Float glass.

to begin with in early cars they were making the primary sheets of glass for the build up of the windscreens from plate glass. or as it was sometimes known. sheet glass. and as vitamin points out, older process, caused ripples in glass, had to be polished and ground flat to remove distortions in the case of windscreens, or even high end architectural use.
float let them produce flat sheets of glass more effeciently with either no polishing or very minimal polishing. cheaper in the long run.

so i think what we see with 914 windscreens is the flip over down at the kinonglas factory where they go from using plate or sheet glass as the raw base material to float glass.
and that happens around about 73 or so. maybe 74. the earlier ones are using S.
the later ones have the same descriptions for glass but use F. its basically essentially the same material just made a different way. of course it would have involved a whole new raft of tests and certificates because thats how bureacracy works. and maybe it had slightly different impact performance outcomes. who knows. you would have to see those codes to pick up any subtleties.

so at this stage i am saying the F/F is the clear screen. or it might be S/S or even just described as plate glass in earlier versions.

but if its got IRA in it, then its the heat control glass. and that can either have F or S in it depending on whether its pre 73/74 or after.

will need to find a better explanation for the side glass i think.
you might be correct about it in relation to side glass and heat control but it does not mean the logic extends to the windscreen so abruptly or directly. like F is all there is to it.

i could expand further. maybe they got performance out of vertical side glass that was F equal to performance out of IRA simply as a result of side glass being vertical and windscreen glass laying over on an angle and being laminated. ie this gave equal performance all round for the so called heat performing glass. given orientation of surfaces and sun assumed to be overhead.

and when you used the straight up F/F windscreen it gave the same performance as the clear or 1 grade glass on the side windows. my solar orientation on architectural windows is kicking in here.

back windows just got 1 grade DELOCURE because its passively shaded by the roll bar anyway. all they want there is heated glass for condensation control as a lux feature.

end of research.
been another roaster of a day here that denied me my 914 drive. (IMG:style_emoticons/default/sad.gif)