Helix Glass supplies masks for sandblasting glass using a photo masking film. The film is very easy to use, as it can be repositioned on the glass several times before finally fixing it in place and then etching.
Designs
Helix can work from your finished designs if they are prepared in pureblack and white, or we can help generate designs from other types of images. 
We can process text, graphic images and most medium to high-quality images, including for example faces, animals, patterns, textures, architecture, sailing boats, cars, handprints and footprints. An example is shown below.
We can also design and supply masks for trophies, celebrations and commemorations.
Resolution
The sandblast masks require medium to fine sandblast abrasive (typically 120 to 360 mesh). The masks are suitable for images with gaps down to 0.5mm gaps (which becomes the etched area) and masked areas down to 1mm width (which stays clear). If smaller dimensions are used, the gaps may not fully clear and the clear parts may start to undercut. The masks are adequate for etching up to 0.5mm deep, or deeper for large features. The smallest text size is 6pt for simple fonts. The maximum mask size is A3 (420mm x 297mm).
Application
Masks are supplied as self-adhesive transfers on backing paper. Once positioned correctly on the glass, the mask should be pressed down to get full adhesion with a squeegee. The top layer is peeled off before etching. Any air bubbles remaining need to be removed before sand blasting by pricking with a fine needle and pressing the film down again and covering with a small piece of masking tape if it is not in the area to be blasted.
Ordering masks from Helix Glass Studio
If you are a new customer please give us a call so that we can get to know what you are trying to do. The recommended process for mask supply is as follows:
Supply artwork and required number of masks and sizes to Helix
We welcome the supply of an electronic file of the images. We can work with most common graphic image file formats. We can also scan hardcopy images.
Helix will provide a quotation for the work required
We will detail costs and timescales for the work required.
Helix will commence work on receipt of a written order (or by email)
Prepare artwork (optional)
If the image is supplied electronically is already a finished black and white only image, with a border of a “clear” area of at least 3mm, then no further artwork preparation is required.
Helix can process photographic images at a cost of £25.00 per hour. Fixed quotations will be given before starting work.
Add text, graphics (optional)
If you require it, Helix can add text and graphics as requested. If you can provide a rough sketch we can send back draft designs to you for approval.
Work is carried out at a cost of £25.00 per hour
Final customer check (optional)
For complex or large images Helix can send a copy of the final images for approval by the customer. We will mark on the image what areas are to be etched and what are to remain clear.
Generate film positive
We make a film master for each design. This enables us to make repeat copies if required.
Process masks and despatch
Masks are normally despatched within 1 week from order (standard delivery)
Faster delivery may be possible – please call us.
All orders are despatched in flat packaging by Royal mail 1st class post parcel service. All delivery costs will be paid by the customer
Store film positive
Helix will hold the film positive in case of further orders for a period of 6 months
If the film positive is required this will be sent at a cost of £6.00
Use of materials
This is the responsibility of the customer, but Helix can advise on attachment of the mask to the glass. If you would like some test masks please give us a call and we can send samples.
Processing of glass by Helix
Please get in touch - we can also etch the glass for you if required.
Pricing
The price is proportional approximately to the area of the mask, subject to a minimum order of £10.00. Helix will send a quotation for the order price once the required size and number of masks has been received, and any requirements for special artwork services are known. Mutiple images can be supplied on the same sheet, either repeating the same or different images.
To give an idea of typical prices:
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50 x 50 mm |
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100 x 100mm |
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200 x 200mm |
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250 x 250mm |
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250 x 400mm |
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A6 (148 x 105 mm) |
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A5 (210 x 148 mm) |
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A4 (297 x 210 mm) |
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A3 (420 x 297 mm) |
Price dependent on the level of detail required |
Prices are subject to change without notice and exclude postage & packing.
All orders are despatched on receipt of payment. Payment can be made by Google Checkout (we will e-mail an invoice to you with details) or by sterling cheque made payable to Helix Glass Studio.
We look forward to helping you.
Preparation of artwork
An example of the image processing we do is a "pen and ink" drawing from an original photograph of Winston Churchill.
This approach is very suited to sandblast work and produces a strong contrasting image which remains very recognizable. Other approaches, such as using conventional halftones, are also available.
Sandblast mask (60mm wide) made from the artwork
Final sandblast image
Larger size sandblasted piece (38cm wide) using Helix masks.
