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<p>[QUOTE="Lecollectionneur, post: 447285, member: 8569"]Kiko, what is needed for this test is only this part, not too difficult with a macro lens but very difficult directly like that, you can take pictures through a 10 centimeters magnifying glass used for philately with good results for example.</p><p>I can have access to polished steel blades used to learn those differences but not at this time as all is closed for holidays and it's 50 kilometers from my home but I want to look in my workshop if I can have some to show you the effects of stone grinding.</p><p><img src="http://image.noelshack.com/fichiers/2018/01/1/1546249394-capture-d-ecran-2018-12-31-a-10-42-46.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p><br /></p><p>Sorry, and thanks for your post but what I can see on the YouTube in link is not a natural stone, without more precision, just looking at the finish it's clear that it's a synthetic stone, on this screen part for example.</p><p><img src="http://image.noelshack.com/fichiers/2018/01/1/1546249903-capture-d-ecran-2018-12-31-a-10-50-58.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p>With natural stone you can't work so fast in part because their lead center is very fragile(and no more authorised by work health legislation in my country), but if you know somebody who has natural stones(in usable condition) for sale I'm interested because we need some to make some experimentation with them in group work about redecorated glass in the past made like embossed english victorian on antique silver or actual forgeries.</p><p>It's not my method to be more precise but it's used in a lot of auction houses and museums.</p><p>I learn that years ago and it has only interest for pieces redecorated, not for making new items as it's near impossible to make glass now like in the 18th century for example outside of archeological industry studies.[/QUOTE]</p><p><br /></p>
[QUOTE="Lecollectionneur, post: 447285, member: 8569"]Kiko, what is needed for this test is only this part, not too difficult with a macro lens but very difficult directly like that, you can take pictures through a 10 centimeters magnifying glass used for philately with good results for example. I can have access to polished steel blades used to learn those differences but not at this time as all is closed for holidays and it's 50 kilometers from my home but I want to look in my workshop if I can have some to show you the effects of stone grinding. [IMG]http://image.noelshack.com/fichiers/2018/01/1/1546249394-capture-d-ecran-2018-12-31-a-10-42-46.jpg[/IMG] Sorry, and thanks for your post but what I can see on the YouTube in link is not a natural stone, without more precision, just looking at the finish it's clear that it's a synthetic stone, on this screen part for example. [IMG]http://image.noelshack.com/fichiers/2018/01/1/1546249903-capture-d-ecran-2018-12-31-a-10-50-58.jpg[/IMG] With natural stone you can't work so fast in part because their lead center is very fragile(and no more authorised by work health legislation in my country), but if you know somebody who has natural stones(in usable condition) for sale I'm interested because we need some to make some experimentation with them in group work about redecorated glass in the past made like embossed english victorian on antique silver or actual forgeries. It's not my method to be more precise but it's used in a lot of auction houses and museums. I learn that years ago and it has only interest for pieces redecorated, not for making new items as it's near impossible to make glass now like in the 18th century for example outside of archeological industry studies.[/QUOTE]
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