Introduction: Complete Stencil Tutorial Using a Free Program

A tutorial on making a stencil with an open source program called the GIMP.

I looked on all the Instructs tagged with stencil, and not one gives a step by step for making a stencil in my favorite open source photo program The GIMP.

Step 1: Materials and GIMP

-What You Need-
-printer
-craft knife
-The GIMP
-surface to cut on (self healing mat)
-spray mount (optional)
-spray paint

GIMP is an open source raster based graphics editor. It was designed to replace Photoshop.
You can get it here. gimp.org

Install it, open it up, and familarize yourself with the interface for a bit. Done? Good. Isn't open source great? Didn't cost a dime!

Step 2: Pick an Image and Open Your Picture in GIMP

Pick a good simple image (remember: simple equals less cuts) preferably on a white background. This can be hacked by simply erasing around an image in MSPaint or what have you.

I chose a tasteful Stormtrooper sculpture to stencil. Nerdtastic!

Step 3: Crop It

Crop out the parts you want to make a stencil of with the Crop/Resize Tool (Tools>Transform Tools>Crop).

a. GIMP allows you to save a copy in case you want to use the uncropped-unedited image later. Save the copy, then go open the copy in GIMP. (File>Save A Copy)

Step 4: Simplifying the Image

We need to simplify the image now. We will do this by Colorify-ing the image. There are two ways of doing this in GIMP.

a.One way is to go to (Tools>Color Tools>Colorize). If you use this method, you will want to set the Hue and Saturation to 0, and adjust the lightness to fit the image (this can be done to taste, generally you want about an even light to dark for a stencil.)

b. The other (and redundant) method is to go to Filters>Colors>Colorify, and select your color (you'll be selecting white).

Both methods are pictured, I chose to use the filter.

Step 5: Tweaking the Contrast and Brightness

Now I'm going to tweak the contrast and brightness a bit. (Tools>Color Tools>Brightness-Contrast) I'm trying to get a hard line on the helmet, the hardest part on this image to keep intact.

Step 6: The Threshold Tool

Next I use the Threshold tool (Tools>Color Tools>Threshold) You'll want to play with the settings to get good hard black and white , which is perfect for stenciling.

Step 7: Stencilable Image

There you go! You end up with a semi usable image.
The key to stenciling is to editing out the "islands" of white in your image. You can make little bridges for them if need be. Once again this can be accomplshed in whatever bitmap editing program (MSPaint) you have lying around. I think the image I have can be edited by hand, so I'm going to print it now.

Step 8: Get Ready to Cut

Get your craft knife(s) and you image and get it all ready for slicing and dicing.

Step 9: Outline Your Cuts (optional)

If you have a fairly low res image, this is a good idea. Silver sharpie.

Step 10: Cut and Spray

Once your done cutting, it's time to spray. A simple one layer will do (you could make a 1.5 layer but that's a different tutorial)

As for spraying.



A guide to cutting stencils

• Think from outside the box.

• Collapse the box and take a fucking sharp knife to it.

• Leave the house before you find something worth staying in for.

• It's easier to get forgiveness than permission.

• Spray the paint sparingly onto the stencil from a distance of 8 inches.

• Be aware that going on a major mission totally drunk out of your head will result in some truly spectacular artwork and at least one night in the cells.
-Banksy

Have fun!

Comments

author
SzczekS made it! (author)2016-06-14

thx for the good work!

i've done the same but my pict was more bigger :)

Besides, I've printed my stencil by poster printer on my a4 printer.

Now, at my home really "star wars"- atmosphere :)

author
jean.babille made it! (author)2015-04-29

author
bradshaw1 made it! (author)2015-03-19

Great job on this instructable and you get extra points for making me laugh!

author
slimguy379 made it! (author)2008-08-06

hello great job... this isn't Really about this instructable but though you could help... I currently have a screen printing business and I'm trying to make a 3 - 6 color shirt.. is there a way to separate each and every color? (using gimp, word, or publisher?) the response would be greatly appreciated...

author
borogoves made it! (author)borogoves2014-12-18

For automatic color separation (2-5 colors) and auto-bridging the stencil, try out

http://baystencil.com

It turns any image into a color-separated stencil with bridged islands.

author
Maxinama made it! (author)Maxinama2009-05-04

It's really easy to do just go image>mode>indexed, select the amount of colors (white backround will count as color) you want and click convert.

author
stevedem made it! (author)stevedem2008-12-12

yeah, you can select each color and separate each one as it's own layer.

author
!revenge! made it! (author)2010-12-23

hi i have a question about the spray painting itself,
i made a stencil a while ago and i wanted to test it before spraying it to my old guitar. but this is what happened: after testing the stencil, the paint caused the paper to curl up.
do you have any idea how i can prevent this the next time i do this?

greets,

Jelle
ps.
my English may be not very good because i am from the Netherlands and i am 14 years old.

author
borogoves made it! (author)borogoves2014-12-18

You can spraymount (3M spraymount) the printed page to a piece of cardstock, then when you cut it out you have a more durable layer that will stand up to several sprayings. Make sure to lay the stencil flat while it dries. Another option is to use Grafix stencil sheets. 5mil or 7mil works best.

author
borogoves made it! (author)2014-12-18

You can stencilize any image without Gimp or Corel Draw, using http://baystencil.com

For example, the stormtrooper here:

http://www.baystencil.com/stencils/order/7c8c05836...

You can totally cut it out yourself after printing the bridged, decomposed images from the website.

Screen Shot 2014-12-18 at 7.06.17 PM.png
author
nick.perry.7798574 made it! (author)2014-07-31

What if I want more layers?

author
katman101 made it! (author)2014-03-21

this was very comprehensive, thank you for making this you are a swell individual.

author
elementrider made it! (author)2011-09-18

how did you blow up the image?

author
HuntingWabbits made it! (author)2011-07-22

Threshold doesn't work :/ My image comes out pixelated

author
skyhawkes made it! (author)2011-06-20

My God man!! This is a giant help and I think I love you... just sayin'... and thank you so much for using GIMP. I fell in love with it like 2 years ago but I never knew I could make a stencil with it. That was stupid easy.

author
JoshuaTerrell made it! (author)JoshuaTerrell2011-06-21

No problem. :)

author
ilpug made it! (author)2011-06-02

Nicely done. i will check out the GIMP. Can it do something that a high-levcel Photoshop program cant? cuz i have one and it works fine.

author
BkrevWlevqe made it! (author)2011-05-08

Thanks a LOT for this i'ble man!

author
CerealKiller made it! (author)2008-08-08

Here's Mine: Just can figure out how to print it.

FullMetalJacketStanleyKu8_fHelmet.jpg
author
DavidKaine made it! (author)DavidKaine2010-12-10

Nice. The other side of the helmet (if this is the one from Full Metal Jacket) would have made for a nice ironic stencil, too.

author
zs made it! (author)zs2010-04-13

ctrl +p

author
rasta_bhoy made it! (author)rasta_bhoy2008-08-18

I don't even print mine. I just use my laptop's LCD screen and I would tape the bond paper on it and just trace on it. That's if you have access to an LCD screen. You also skip the outline and printing part too.

author
zatla made it! (author)zatla2009-08-03

Haha I tend to do the same, I also use a piece of thin transparent plastic in between the paper and the screen. (A4 fits very well on 15,4") Bless!

author
mhkabir made it! (author)mhkabir2009-08-28

Don't pixels get stuck on the screen?

author
theRIAA made it! (author)2006-12-24

nice! if you are doing a face or something tricky you may want to try out changing the hue or color of the image to greater tune in details when its in B&W (adjustment layers in PS is the only way i know how to do this)

such as:

http://dpchallenge.com/tutorial.php?TUTORIAL_ID=43

(before stencilizing it)

author
92033 made it! (author)920332010-06-08

3-1/2 Years Later :-) (just discovered this)...THANKS For Posting the URL. GREAT STUFF.

author
Russian sniper made it! (author)2010-02-22
author
Charles IV made it! (author)2010-01-17

Here's mine:

King Crimson Red.jpg
author
PKTraceur made it! (author)2009-02-26

Anyone Guess how long? I did this with ONE very sharp pocket knife, cutting it on top of about 20 more papers. Nearly 2 HOURS. The result was kickin' though!

author
PKTraceur made it! (author)PKTraceur2009-02-26

-RoAr

Parkour Shirt Stencil.xcf
author
PKTraceur made it! (author)PKTraceur2009-02-26

-Roar

Parkour Shirt Stencil.xcf
author
PKTraceur made it! (author)PKTraceur2009-02-26

Grr....

author
PKTraceur made it! (author)PKTraceur2009-02-26

Here is what it's based off of...

parkour_logo_500.jpg
author
volquete made it! (author)volquete2009-09-06

w00t! parkour rox!

author
bvulgarin made it! (author)2009-07-22

Very useful, thanks!

author
soongone made it! (author)2009-05-19

Thanks it was easy to understand

author
robbs made it! (author)2009-05-01

I tried to change the color of my stencil using "select by color" but it remained black. What am I doing wrong? Thanks for the input.

author
ericgay made it! (author)2009-03-21

NICE!

author
fwjs28 made it! (author)2009-02-26

woot!

Tux.png
author
PKTraceur made it! (author)2009-02-26
If it's any help, and your colours are inverted, try colours
author
runkrocker made it! (author)2008-03-28

cool instructable! vey vey helpful. i dont fully know all of what photoshop and gimp can do and this was awesome. i made an invader zim stencil. yay!!!

zim_plotting-full.jpg
author
PKTraceur made it! (author)PKTraceur2009-02-26

GIR!

author
patycuack made it! (author)2007-03-29

what do you think about this one i made minutes ago... first try, i think its not well done..

Pin-up%j20027.jpg
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cornflaker made it! (author)cornflaker2009-01-12

It's quite good if you can actually cut it out...

author
master-of-chaos made it! (author)master-of-chaos2007-06-03

its good but u need to sure up some lines, smooth it out

author
JoshuaTerrell made it! (author)JoshuaTerrell2007-04-01

haha, not bad at all, I'm glad to see evryones getting in the act

author
eat_squids made it! (author)2008-12-25

Yeah...here's a couple i did. Hope you like them/

author
eat_squids made it! (author)eat_squids2008-12-25

For some reason they didn't post...here they are for real =)

darth_vader.jpgNazgul.jpg
author
James Haskin made it! (author)2008-10-19

Great instructable I love it so much!!

author
schneidp20 made it! (author)2008-10-17

You can also use shelf covering paper (actually plastic). 3M 77 spray your printout to the shelve paper and then do your cutting as usual. Then you'll have a self adhesive mask that is reusable ... to a point.

About This Instructable

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Bio: I'm a BSME Student @ Georgia Tech, member of GT Maker's Club, a musician, a visual artist, a gamer (both electronic and IRL)
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