The recognised standard in Archaeological Gridded Drafting Film Sheets :
320 x 290mm with 1, 5 and 10mm blue grid, which disappears when copied or scanned leaving only the drawing.
Archival quality, dimensionally stable and printed on 50micron drafting film.
At 1:20 this sheet covers a full 5m square with space for overlap Can be used for sections as well.
This can be best used with white paper beneath on an A3 clipboard or a white backed drawing board.
At the base of the sheet the following prompt boxes allow all plans and sections to be annotated as per Museum of London Archaeology standard
Plan / Section No. - Drawn By - Checked By - Date - Scale - Notes and Site
Sold in packs of 25
Once known as Permatrace. This drafting film is waterproof (Care should always be taken when working in wet weather - to ensure you do not wipe over pencil drawings)