upscaling decals

guys, is it possible to upscale a set of decals; i have a 1:24 set i wish to convert to 1:18; am i right in thinking this is a 25% increase (increase of 6 which is 1/4 of 24); what do i need, is it something special?
cheers in advance guys

If you can wait a few days while my laptop comes back i can do it for you Billy. There is an exact percentage but ive it saved in a file on the laptop.

While scaling up to 1/18, sometimes some things need to be redrawn as any small defect on the scan will become bigger.

Wow, that's a headache causing question Billy! However, I think it's a 133.3% enlargement Billy...

A logo 100cm long @ 1/24 scale is 4.17cm long on the model - correct?
The same 100cm long @ 1/18 scale is 5.56cm long on the model - correct?

So on a 1/24 scale model the 4.17cm long logo needs enlarging to 5.56cm long to fit the 1/18 scale model - correct?

5.56 divide by 4.17 equals 1.3333333333333333 which equates to a 33.3% increase in size - correct?

Well I think that's right, but maybe someone else could confirm my calculations?

Cowley wrote:Wow, that's a headache causing question Billy! However, I think it's a 133.3% enlargement Billy...

A logo 100cm long @ 1/24 scale is 4.17cm long on the model - correct?
The same 100cm long @ 1/18 scale is 5.56cm long on the model - correct?

So on a 1/24 scale model the 4.17cm long logo needs enlarging to 5.56cm long to fit the 1/18 scale model - correct?

5.56 divide by 4.17 equals 1.3333333333333333 which equates to a 133.3% increase in size - correct?

Well I think that's right, but maybe someone else could confirm my calculations?

wow... so much maths

Might be a load of gob shoite though Joe!

Surely it's the 33.33% increase as a 100% increase would double it to 1/12!!!

Cowley wrote:Wow, that's a headache causing question Billy! However, I think it's a 133.3% enlargement Billy...

A logo 100cm long @ 1/24 scale is 4.17cm long on the model - correct?
The same 100cm long @ 1/18 scale is 5.56cm long on the model - correct?

So on a 1/24 scale model the 4.17cm long logo needs enlarging to 5.56cm long to fit the 1/18 scale model - correct?

5.56 divide by 4.17 equals 1.3333333333333333 which equates to a 133.3% increase in size - correct?

Well I think that's right, but maybe someone else could confirm my calculations?

Your correct, its 133% scaling from 1/24 to /18. Ill post up all the scaling values when i get the laptop back

Mere terminology Sean...

An increase of 33.3%, or an enlargement to 133.3% might have been a better way of putting it.

I'll just pop back and edit my post a tad!

Just messin' David - take no notice!

guys............brilliant!!!!!!

just thought my simple logic would be wrong, thanks david and sean for correcting this and brian for the offer of help m8...........very much appreciated!

cheers chaps!

sbuckley wrote:
Just messin' David - take no notice!

bmd wrote:guys............brilliant!!!!!!

just thought my simple logic would be wrong, thanks david and sean for correcting this and brian for the offer of help m8...........very much appreciated!

cheers chaps!

No probs!

i know nothing about this but bruno downsided decals for me from 1/24 to 1/43 he might know the size for going the other way.

Found the file on a hard drive

To scale from 1/24 to 1/18, scale by 133%
To scale from 1/24 to 1/43, scale by 59%

To scale from 1/18 to 1/43, scale by 42%
To scale from 1/18 to 1/24, scale by 75%

To scale from 1/43 to 1/24, scale by 179%
To scale from 1/43 to 1/18, scale by 238%

These of course are the mathematical scalings, and while they will allow an excellent start point, a trial print should be used to make sure they are ok. A small error in sizes in 1/43 will only be exaggerated when scaled up to 1/18

brilliant brian, so now that we know the maths, is this something i can do using my works scanner, or do i need one of the special pieces of equipment you boys have? i have the decal sheet in my hand..........
cheers m8

It may work with the scanner, but be sure to scan it at normal size as well, then, if the scanner doest size it correctly, a program can be used to scale it up

thanks brian, i'll have a go at work this week, but worried about losing sharpness when upscaling....stay near your pc m8 lol!
cheers guys

ok folks, good news and bad.....
the works scanner has upscaled them perfectly to 133% of the original, and the quality is perfect....no blurred lines etc;
only thing is, the original sheet was a kind of blue-grey colour, and this also shows on the upscale; so when i try to create decals, the background colour will be blue-grey, not clear as required...this is obviously only a problem with things like writing, where the background is seen, on solid decals which i cut out, its not n issue.....what am i missing?

those Vatanen decals arent the most complex, probably be as well to redraw them? If you're in no panic and not sorted in a week or 2 I'll get you sorted

david thats v kind m8, i have the original and the new 1:18 scale both here, whichever you need...........

i got the same problem now somebody wil do it for me and it wil be a beauty

rob my scanner at work does the re-scaling perfectly, its the background sheet colour that is the problem...if you need any simple up-scaling done, i would help if i can m8......

theres a tool in photoshop (think its the magic wand tool) that allows you to select the background colour and delete it. Not the best way but certainly the easiest and should produce a good finish

Or the 'marching ants' tool as I call it Brian!

thanks guys, been thinking about this all morning (yeah i'm at work lol!); this is maybe a stupid suggestion.....what if i soak all the original decals, remove them as normal from the blue background sheet, and place them carefully onto a white a4 sheet of paper....then i scan this and copy it onto my blank decal paper? would that be a silly notion? i would lose my white decal but could do that separately.........
am i talking cr_p?