Beva® 371 Film - Adhesive Film

Beva® Film is an adhesive, genuine Professor Gustav Berger's 371 formula (Berger Ethylene Vinyl Acetate 371), created specifically for conservation applications. We have it available as an adhesive film sandwiched between white silicone-coated paper and a polyester supporting sheet.

Activate the adhesive with a tacking iron or hot air blower (see 'Recommended' tab below), and remove the support film. Since it is not a liquid it can be cut and applied to small, well defined areas, with no fear of it spreading or bubbling. Further information on application is available in the 'Specification' tab below.

You'll find many uses in the repair of papers, paintings and textiles. Two thicknesses - 63.5 micron (2.5mil) and 25.4 micron (1.0mil).

Also available Beva TEX, with the same adhesive formula on a non-woven polyester fabric (see 'Alternatives' below).

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Beva® 371 Film - 63.5μm - 686mm x 6M
P695-371 695-371
Pack Size: Roll Price: £124.50 ex VAT In Stock
Beva® 371 Film - 63.5μm - 1372mm x 6M
P695-1372 695-1372
Pack Size: Roll Price: £240.00 ex VAT In Stock
Beva® 371 Film - 25.4 μm - 686mm x 6M
P695-1325 695-1325
Pack Size: Roll Price: £124.50 ex VAT Low Stock

Instructions for use of BEVA® 371 film

BEVA film comes sandwiched between a white silicone-coated paper and a silicone-coated polyester release sheet. The BEVA film and its release sheet are completely transparent and dimensionally stable. If wider sizes are required, two or more pieces of BEVA film may be joined by taping them together from the back of the polyester release sheet.

Lining a painting with BEVA® 371 film. 1. Preparation of the Support:
A: Align the painting on the support and make its outline on it.
B: Cut a piece of the BEVA film to cover the outlined area.
C: Remove the white cover sheet. The BEVA film remains on the inside of the polyester release sheet (thefilm side feels soft to the touch and looks slightly mat).
D: Place the BEVA film on to the support with the shiny polyester to the outside.
E: To transfer the BEVA film on to the support, heat your hot-table to 150 degrees F (65 degrees C) then use vacuum, hand pressure or roller. NO NEED FOR THE ADHESIVE TO DRY, YOU MAY PROCEED WITH THE LINING WITHOUT DELAY.

2. Preparation of the Painting:
A: Consolidate all loose paint.
B: Close tears and holes.
C: Face painting, if necessary.
D: Remove the painting from its stretcher.
E: Clean the back of the painting. Shave off any protruding knobs and extraneous materials. If the painting was lined before, remove old lining, adhesive, etc. in order to get the back of the original canvas as even as possible.
F: Any necessary pretreatment should be performed prior to lining.

3. Lining the Painting:
A: Place the prepared support on the hot-table, film side up, and remove the silicone coated polyester release sheet.
B: Place the painting on the area covered by the BEVA film.
C: Activate the BEVA film by raising the temperature to 150 degrees F (65 degrees C) to achieve an instant nap-bond.
D: Cool under light pressure applied by hand, brush, roller or vacuum.
4. Helpful Suggestions:
A: If lining at temperature lower than 150 degrees F is desired, the BEVA film should be sprayed lightly with naphta or methylene chloride, after having been attached to the selected support. The sprayed BEVA film will become tacky like a contact cement, and may be used as such at about 100-110 degrees danger to even the most delicate textures and paint films because at elevated temperature the canvas and paint films are suffi ciently relaxed to allow for distortions to be eliminated with minimal pressure. A hot-air blower can be very useful for local treatments with the BEVA film.
B: A firm bond will result after cooling and evaporation of the sprayed-on solvent.
C: If still less pressure is required, the back of the painting should be sprayed with BEVA 371 adhesive, diluted in fast-drying solvents such as VM&P naphta, toluene, or trichloroethane, in a way that it forms “cobwebs” and a soft felt on the original canvas.
D: BEVA film has excellent adhesion to wax, although its strength will be greatly diminished.

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