Grinding a block of glass from rough grind to final polish

[@philipfrank1833]

It would be safer to bevel before 270 grit to prevent chip-out scratches. Also using a sharpie is a good way to tell if you are grinding evenly and all the way through each grit.

[@hisglassworksinc]

Excellent suggestions, Thanks!. I do sometimes make a seaming bevel on the 220 silicon carbide belt on our belt sander. Just depends on the piece.

[@bradsmith5136]

I find that the sharpie both grinds away, AND washes away with water. Sometimes, even though the sharpie is gone, that particular grit step is not quite complete. This is especially true the higher the grit you go. Learning to look critically at the actual quality of the ground surface as you work, and being able to identify scratches and rough patches without the aid of the sharpie is a valuable skill.

[@heukelummer]

i would go up to 1200 grid before cerium or from 400 to pumice and then cerium(that goes a lot faster.

[@hisglassworksinc]

1200 grit on glass is virtually a waste of time. It works great for lapidary but no so much for glass. Moving from a smoothing pad to a pumice step can substantially cut down polish time, but we've found anything above a 600 grit to cause more problems on the glass than they solve.

[@heukelummer]

@Dariel Randy You will be monitored...

[@saqibhussain7217]

very informative video. I have a question regarding lens manufacturing. what is the relation between the degree of the sphere of tool and lense number?

[@hisglassworksinc]

That's unfortunately outside my wheelhouse as there are specialized machines for grinding lenses

[@jb-xc4oh]

Fascinating..!!

[@brooks5899]

Hi there, great video. I been thinking in order one of your grinders, also do you sale on your website a glass like that one you are polishing in your video? I look in your site and you don't have any. Please, if you don't sale it, can you tell me where I can buy it ?? Thank you.

[@hisglassworksinc]

The glass block is actually a bunch of scrape from our furnace that I cast into a block just as an example. You can see all the air bubble lines in the block from the various layers of material that I put into the mold.

[@brooks5899]

Thank you.

[@johannainglis6338]

great explanation! thank you.

[@MiguelRomeroEscorcia]

Hi there, sorry what's the name of the machine? wesome video

[@hisglassworksinc]

This is the Covington 24 inch lap grinder listed here: www.hisglassworks.com/shop/machinery/flat-grinders/large-grinders/covington-grinders.html

[@abdellatifkata2227]

O vidro apenas dobra com o calor ou existem alguns materiais

[@butzmn7190]

What is the proper name for those mashines?

[@hisglassworksinc]

The saw was an MK-101 and the Grinder is the Covington 5045

[@nopityfac8609]

Any tips for polishing with a Dremel tool?

[@hisglassworksinc]

What size surface area are you working? How much grinding is required? Are you only polishing? You can also email us at [e-mail]

[@MrRola65]

Pls . Put the name, price, where can we buy. Thankyou

[@hisglassworksinc]

Our grinder are all listed here: www.hisglassworks.com/machinery/flat-grinders.html

[@mustafasahin159]

hi. haw can I polish parfums bottles ? can you help me about it thank you

[@hisglassworksinc]

The process would be very similar. It would depend on the bottom of the bottle and how large the surface area is and how much glass needs to be removed. You can email us at [e-mail]

[@randikash5825]

Safety glasses

[@hatfieldmain]

May I ask where you source the Glass Blocks please

[@hisglassworksinc]

We actually make most of these from our own furnace. Depending on the type of glass you are interested in, I can make some recommendations.

[@hatfieldmain]

Hi Thank you for the very prompt reply. I should explain I have worked with most materials but never Glass. By chance I happened upon a 'Cold Glass Sculpture' article where basically Crystal lead glass blocks were worked [that sounds far simpler that it is considering than the amount of time and effort involved] then coated in 'ordinary' Glass to produce quite extraordinary works of Art. As I have always enjoyed the grinding and polishing of Machine parts. I thought I would look into this further before going off half cock as to logistics involved both machinery and materials and the the skill sets required which is why I was drawn to your site and the excellent video on 'Polishing and Grinding'.What is very frustrating is finding who supplies the 'raw' materials ie Lead Crystal and Di chromatic Glass. It was seeing the Glass Block in your Video that prompted me to ask. I live in the UK . I would appreciate any advice you can give. Once again thank You

[@hisglassworksinc]

You can check with xyzglass.com in the Czech Republic for lead crystal glass blanks for coldworking. For Dichroic I would suggest starting with Coatings by Sandberg here in the US.

[@hatfieldmain]

Hi Thank you again for the speedy response I appreciate your help and will follow up on those leads. Cheers and best wishes

[@wuhazet]

pokazałeś najbardziej równy bok a nie pokazałeś jak polerować te resztę nierównych ścian...

[@hisglassworksinc]

The same process would be used on each side. If you were grinding the whole block, you would do each side on one grit, then change to the next grit and work each side, over and over until the polish stage where you can finish the piece.

[@cavemanvi]

You’re going to wanna..

[@LaurensiusYuliusTahaka]

i'll try 600 and then polish..... ^^V

[@hisglassworksinc]

should work quite well

[@abdellatifkata2227]

O vidro apenas dobra com o calor ou existem alguns materiais