Re-using spray cans.

[toxo]

This came to the fore again after Dikman started talking about airbrushes. Thought about doing it many times because I think having a charged up spray can of each of your most used dyes is a great idea but never tried doing it until now.

Let me begin by saying this is a fail but not by much. Read on.

I started off with an empty paint can and one of those rubber nipples you use to blow up your car tyres.

Wanted to see if it could be done the same way it's done on your car, ie no glue, so I drilled a hole a bit smaller that the grommet.

There was too much meat on the nipple. Couldn't get it in the hole so I cut away some of the meat.

Once it was in I undid the valve and poured in some thinners to clean it out.

Then I pumped it up gradually to see if it would hold and it did...... for a while. It held at just over 100psi

Until this happened and it blew out.

So cutting the rubber away and brazing or soldering would definitely be the way to go or maybe even araldite.

The part I'm not sure of is the spray pressure. I was checking by pressing the the top now and then but the air coming out didn't seem right for the psi but that was with an empty can. When I held it against my skin it seemed reasonable. What are the hive's thoughts on whether it would be better with some fluids in it? I know if I filled it to about a third I definitely wouldn't be putting 100psi in it. Would the setup work as is with fluid and maybe only pumping up to around up to around normal tyre pressure, maybe 30psi.

I'll have another experiment but it would be useful if you guys chipped in.

[fredk]

I have a thing called a 'Jenni can'. Its basically the same. Recommended PSI is about 50 max. Its many years since I used it. I found it recently, then misplaced it again

afair the valve on the Jennie is all metal and screwed into the bottle

[Mulesaw]

We had something called a "sure shot spray can" on one of the ships I worked on. That worked brilliantly, but it wasn't as cool as recycling an old spraycan.

https://www.sureshotsprayer.com/

The company is still in business, but they aren't exactly cheap, but I am pretty sure that they would work with a dye for leather.

 

[fredk]

A thought; get a spray can which has a rotatable nozzle. On some cans the nozzle where the paint comes out can be rotated through 90 degrees. Thus you can get a thin tall spray or a thin wide spray. Sometimes the nozzle head with this can be taken off one can and put on another

[toxo]

Update; Filled with half a cup of water, pumped up to just under 30psi. Worked really well but only when used upside down??? Maybe I damaged the tube when drilling the hole. At around 30 secs you can see it stutter when i altered the angle but recovered when I went back to the original angle.

This can is working well with no glue or solder despite being messed about. There are so many plus points to this hack. No more going rigid with fear as soon as you take the lid off a bottle of dye in case you knock it over. Just pick it up and use it. When empty just re-fill it. Have a different can for each colour including whatever mix you're using.

 

[dikman]

I made one years ago to use with a WD40-type bulk oil. I soldered a stem onto the can, so it was pretty solid and pumped it to around 30 psi, I think, mainly because I had no idea what pressure it would take. It worked, but tended to slowly lose pressure. I've still got the can but I don't use it for anything, I found it easier to re-use plastic trigger-pump bottles.

[Handstitched]

It would be just my luck I'll blow myself up trying that out     

"here lies HS after he tried an experiment he saw on LW.net. "  

HS

[toxo]

4 hours ago, dikman said:

I made one years ago to use with a WD40-type bulk oil. I soldered a stem onto the can, so it was pretty solid and pumped it to around 30 psi, I think, mainly because I had no idea what pressure it would take. It worked, but tended to slowly lose pressure. I've still got the can but I don't use it for anything, I found it easier to re-use plastic trigger-pump bottles.

For WD40 you're probably right, probably gunked up the tube over time hence lack of pressure. I know there might be reliability issues but so far I'm impressed enough to keep going. Just the idea of being able to pick up a can of "dark brown" or "tan" or a custom colour and use it is good enough for me and no looking for applicators or streaks or cleaning up.

@Handstitched It did blow the nipple out @ 103psi but at normal tyre pressure - 30psi - it didn't even distort the nipple.

[fredk]

I know you're having fun but an easier solution is an ordinary home mist sprayer; the type sold for spraying water on to plants, or spraying cleaner on windows. I used one to spray diluted Resolene on some things

And I found my Jenni Can and got it cleaned up. I think it might still work

Air in valve on left, release valve on right. The top unscrews for putting the fluid in. It takes a range of different changeable spray heads

[chuck123wapati]

dye in a home made pressurized can reminds me of mr bean painting with fireworks lol it was a great episode!

[toxo]

7 hours ago, fredk said:

I know you're having fun but an easier solution is an ordinary home mist sprayer; the type sold for spraying water on to plants, or spraying cleaner on windows. I used one to spray diluted Resolene on some things

And I found my Jenni Can and got it cleaned up. I think it might still work

Air in valve on left, release valve on right. The top unscrews for putting the fluid in. It takes a range of different changeable spray heads

That Jenni can looks useful Fred but every time I've ever used one of those finger pull sprays sooner or later it starts spitting. fine for watering plants or WD40.

[Doc Reaper]

Uhmmmm, why go thru all this trouble when you can use an airbrush?? Just asking for knowledge, but I also understand the need to build cool shhtuff 

[fredk]

1 hour ago, toxo said:

That Jenni can looks useful . . .

Its not really. In the 35 years I've had it I think I've used it no more than 3 times. The air pressure goes down very quickly, after only about less than a minute of spraying then you need to use a compressor to recharge it, so you / I might just use a regular spray brush running off the compressor

Edited July 29, 2022 by fredk

[chuck123wapati]

32 minutes ago, Doc Reaper said:

Uhmmmm, why go thru all this trouble when you can use an airbrush?? Just asking for knowledge, but I also understand the need to build cool shhtuff 

yup i use glass ones of these these or similar even have one full of airbrush cleaner.   https://www.toucheairbrush.com/product/943539/4oz-plastic-bottle-assembly-for-h-model-airbrush-fits-paint-bottles/

[tsunkasapa]

12 hours ago, Handstitched said:

"here lies HS after he tried an experiment he saw on LW.net. "  

Well, we can all lift a mug to your memory! 

[toxo]

3 hours ago, Doc Reaper said:

Uhmmmm, why go thru all this trouble when you can use an airbrush?? Just asking for knowledge, but I also understand the need to build cool shhtuff 

Not knocking airbrushes at all. I have two somewhere. Great for small/intricate stuff but I don't do much of that. I hear what peeps are saying about loss of pressure but I'm basing the following on the premise that it doesn't. It can't be that hard to seal the damn thing properly. Whenever do you use a spray can once and it loses pressure. OK, assuming you can seal it;

The thing that appeals most to me is being able to grab the colour I want, spray the leather, DONE until the next time. If I have to re-charge after 10/12 times I'll take that. No looking for compressors, no cleaning airbrushes, FAR less cost in dye over daubers, sponges, brushes etc and NO streaks. It's a win win win for me.

Just thought of another plus. If I want a mottled effect like the last bag I posted here, I can just spray the sponge. Take the way I did it before, 1st colour, take lid off bottle, take clean dauber, tip bottle up on dauber, daub the sponge. dab dab. replace lid on bottle replace bottle. 2nd colour, repeat, 3rd colour, repeat. All the while praying one of the bottles doesn't get knocked over.

 

[fredk]

A wee tip. What you are trying to make is just a refillable spray can. Something I learnt to do with regular ones; keep them very warm just before and during use. Very warm but not hot. Stand it in a jug of very warm water until the can itself is very warm. If the session is long return it to the jug of water. This increases the air pressure but as long as the can is very warm the pressure will stay high. You can do this with any aerosol can. It helps to get the very last of the contents sprayed out

[Handstitched]

14 hours ago, chuck123wapati said:

dye in a home made pressurized can reminds me of mr bean painting with fireworks lol it was a great episode!

No matter how many times I've watched that, still cracks me up . 

Imagine that as me, covered in dye? ....with my middle finger extended instead of a hat  ????

Sh**********t!!!! 

8 hours ago, tsunkasapa said:

Well, we can all lift a mug to your memory!

Thank you friend  but don't forget the  bar snacks  

HS