At least it used to be the Rotring ink for Mylar drafting film. For the refillable ones (Isograph in here)there was a gold sticker in the ink bottle, and for non-refillable ones (Radiograph in here) the rear end of ink reservoir was painted with gold paint.
But they are not available anymore, I'd also like to hear what's a good replacement. L

Mike, nice pictures and that is a fancy pop bottle.


I sorted through an old Windy video, and he said Rapidograph for ACETATE worked the best.

Is that what folks use?

Mike, nice pictures and that is a fancy pop bottle.


I sorted through an old Windy video, and he said Rapidograph for ACETATE worked the best.

Is that what folks use?

Hi Steve

I believe they are essentially the same thing.  One uses pre-filled cartridges and the other you fill yourself.
I have a Rapidograph (for fine lines) and the Isograph in the link above (for slightly wider lines).

https://www.pullingers.com/rapidograph-and-isograph-pens

Essentially they draw the same but the Isograph gives you greater flexibility on the ink colours you can use but is more of a faff to fill up.  You need to use the right inks apparently as using any old ink or whatever can bugger them up 😃

Mike

PS might be a transatlantic translation thing but ACETATE in the UK nearly always refers to Acetate sheet.  The stuff you make canopies/cockpit windscreens out of.

I use Higgins pigmented drawing ink, 44021. I got it from Amazon. It’s not waterproof, so you can wipe off anomalies.

I don't -anymore.    Many years ago I fed my family as a draftsman and used Rapidographs every day.   That translated to models too of course.   I'm not sure that company still exists any longer and the supplies would have to be very hard to get since it is an OLD art form.   I still have ONE Rapidograph left but don't use it anymore.  It is far too much hassle to clean and use.   Now I use fine line markers from Walmart.   These come in sets of varied width just like a Rapidograph set and do the very same job but without the mess.   You don't fill or clean anything-just pull the cap off and draw.  The finished job looks exactly like Rapidograph.   Mistakes can be wiped away with an alcohol dipped tissue or swab.   It is also a little less likely to smear when handling.   Once done I lightly spray clear dope over the lines to lock them down then proceed with the finish coats.   Easy,  cheap and no ink under the fingernails for a week.  You will also find these (maybe more variety) at Hobby Lobby.


Dave

The best ink for doing panel lines is Koor-I-Noor 3080-F.