Hello all :-)
thank you for the replies! There has been mixed responds, some calling them nonfunctional or not glazed at all. I disagree since I own work by these potters and they are great and definitely glazed! However, some of you were believers in the existence of this transparent/see-through matte(ish) glaze.
Maybe I didn't choose my words right, I'm looking for a non-high-glossy glaze that shows the character of the clay. ( a bit earthy ). Possibly a 'satin' does the trick. These pots by Denise Rijnen show exactly what I'm looking for. The marbled cups are definitely glazed because you see the orange line., but the glazes does show the character of the different clays underneath... that's pretty transparent/see-through/translucent if you ask me.
I went ahead and asked the artists directly what they used.
Annemieke Boots didn't really want to tell, the response i got was : 'It’s a glaze I adapted to my use, a glaze of Lucie Rie. Just check, google and try!!'
I tried to google it and wasn't very successful. :-(
I asked Julia, and she gave me a link to a ceramics shop that sold a transparent matte powder glaze! juhu!
https://www.keramikos.nl/aardewerk-poederglazuren/1743-matglazuur-transparant-1kg.html
And Denise Rijnen I still have to ask.
@Bill Kielb your recipe looks great! Thank you for taking the time to share it!
Thanks @Callie Beller Diesel for trying to figure it out with me :-)