Topic: Opaline Glass Bottle/Flacon

[NevB]

Ekimp, I'd not tried it before so I took photos of the pages, transferred them to my laptop and and used Google to translate the text. It basically says what I thought. It's difficult to be sure but I would guess mine was frosted and the snake applied afterwards.
m, I'm sure I've seen French pieces with the same sort of numbering. The gilding on the snakes is just a stripe down each side, no sign of anything else.
The attribution of that jug to St. Louis looks debateable going by the images on PK.

[flying free]

Ekimp, yes the book actually has a chapter "Decors Graves et Depolissage"/ engraved and de-polished. From what I can gather they used both hydrofluoric acid and abrasion by rubbing with very fine sand, emery and water. They heated  a mixture of calcium fluoride, chalk and sulphuric acid to produce a vapour to do the frosting, interestingly they then diluted any leftover liquid with water and stored it in lead or gutta percha/rubber containers.  Some of it's a bit too technical to understand, I might try Google translate. There is a page of the St. Louis 1851 catalogue illustrations in the book with bottles but not one exactly like mine, however there is a picture of a water set with a similar bottle, minus the snake.

Does it discuss Cristallerie Saint-Louis using this etching method on opalines?
I'm just curious ( I have a blue 'Etruscan' style vase I've been trying to identify for donkey's years) because all the ones I see are highly polished/shiny exteriors like these:
https://cdn-bbagm.nitrocdn.com/NsnkCQqpWdOulWSJzQyDCyGWSpLAdiyT/assets/images/optimized/rev-5abe659/www.mv-bracelet.com/wp-content/uploads/2019/06/opaline-vert-saint-louis.jpg

and bang on cue this appears which is frosted and seller says is from Saint-Louis:
https://www.proantic.com/en/539829-opaline-cup-of-crystal-saint-louis.html#

[flying free]

and I posted a uranium glass green lustre with a white snake years ago. This is what Mike M said
https://www.glassmessages.com/index.php/topic,45325.msg253389.html#msg253389

[NevB]

I haven't read through the whole text of the book yet but in the section on engraving/frosting it doesn't mention specific manufacturers, but most of the pieces illustrated aren't frosted.