§ 17
How large should the window be cut, and how wide will the margin be?
Answer: The mount's outer edge is the frame's rabbet and the window is cut a bit smaller than the motif so the edge covers the motif with a small overlap and holds it in place. Many framers give the bottom a slightly wider margin than the top because a centrally placed motif looks like it hangs too low. The calculator gives the window's dimensions and the three margins so you can set stops and cut straight.
Vindue = motivets mål − 2 × overlap (cm × 10 = mm)
Sidemargin = (yderbredde − vinduets bredde) ÷ 2
Topmargin = (yderhøjde − vinduets højde − bundtillæg) ÷ 2 · Bundmargin = topmargin + bundtillæg
Kontrol: topmargin + vinduets højde + bundmargin = yderhøjden
| Symbol | Meaning | Unit |
|---|---|---|
| ramme_b | Mount's outer width (frame's rabbet) | cm |
| ramme_h | Mount's outer height (frame's rabbet) | cm |
| motiv_b | Motif width | cm |
| motiv_h | Motif height | cm |
| overlap | Overlap per side (the mount covers the motif) | mm |
| bundtillaeg | Ekstra margin i bunden (0 = helt centreret) | mm |
| = | Side margin | mm |
| = | Top margin | mm |
| = | Bottom margin | mm |
| = | Window width | mm |
| = | Window height | mm |
Does not apply when
The calculator's own default values inserted. The figures are calculated with exactly the formula the tool uses.
Substituted
Giver
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Når du laver en passepartout, skal vinduet skæres lidt mindre end motivet, og marginerne skal se rigtige ud. Beregneren giver vinduets mål og marginerne med et bundtillæg.
En akvarel på 30 × 40 cm skal i en ramme med falsmål 50 × 70 cm. Du giver 3 mm overlap og 10 mm ekstra i bunden.
It means: Vinduet skal være 294 mm × 394 mm. Sidemarginen er 103 mm, topmarginen 148 mm og bundmarginen 158 mm.
Et fotografi på 24 × 30 cm skal i en ramme på 40 × 50 cm, og kunden vil have det helt centreret.
It means: Vinduet skal være 234 mm × 294 mm. Sidemarginen er 83 mm, top og bund er begge 103 mm.
Bundmarginen skal være lidt bredere end toppen.
Top + vindue + bund = yderhøjden: 148 + 394 + 158 = 700 mm.