Pfaff 1245 vs. Mitsubishi 3300? Which one for what I sew?

[dikman]

I don't see where the problem is - keep both, of course!

[Uwe]

10 hours ago, BrownChicken said:

2k paint

I'd never even heard of 2K paint before today. Got an early start on meeting my daily learning quota today. Interesting paint - I'll have to give it a try sometime. Downsides are the paint is not cheap at around $20 for one aerosol can, and it's a one-shot deal - once you release the hardener, the clock starts ticking and any unused paint will harden inside the can. 

Your restoration of this Singer 111W155 deserves its own topic. 

Here's a screenshot from the Eastwood Website with a nice glossary that describes the various paint options:

 

 

Edited November 18, 2017 by Uwe

[mikesc]

2K is a single can version of what automotive painters and custom painters know as "2 pack"..the "clear" 2K is an aerosol version of 2 pack clear..Most of this stuff uses an isocyanate ..ioscyanates vapour can seriously harm you, temporarily, long term or even kill you if you breathe them in (..extremely simplified explanation is that when the vapour containing them is inhaled, they then block the oxygen exchange mechanism of your red blood cells that you need to stay alive,symptoms of isocyanate vapour inhalation are, your joints will ache, you'll be short of breath, your breathing will become severely laboured, you may hallucinate, you may lose consciousness and may stop breathing )..these symptoms may start showing upto a few hours after "exposure".. You may have finished painting or applying your clear coat, washed up, eaten a meal or gone out, or fallen asleep..By the time you realise that you have breathed the isocyanate vapour in, you'll already be having some symptoms, which may get worse, much worse..

This stuff must be used with a mask ( cartridge type ) that protects against solvents and vapours..We discussed a 3M mask recently somewhere here that will be suitable..the the "activator" in most of these paints is also highly carcinogenic.

Even spraying this kind of stuff outdoors without a mask is a bad idea..spraying it indoors ( even in an automotive spray paint booth with extraction ) a mask is mandatory..

I used a lot ( hundreds and hundreds of litres ) of this type of paint ( it exists as pigmented 2 pack too ) as both paint and clear and prep fillers when I had my custom painting business, one of the main reasons why I closed that business down was to avoid continuing using these types of paint.

The pigmented 2 pack is used to paint truck chassis, and large objects like cars , boats, planes etc ,truck cabs and trailers ..

The clear 2 pack is what we put over artwork ( custom painting or lettering ) or over metallic paint finishes ( if your vehicle has "metallic "paint the clear 2 pack is what is protecting it ) ..the most hard wearing versions of 2 pack are used on planes ( very high UV exposure ) and boats..Expoxy 2 packs last longer on chassis than isocyanate 2 packs do..Sometimes this stuff ( not the expoxy versions ) is also know as "polyester" 2 pack ( when it will usually have a filler incorporated to surface cover defects )..or as 2 pack polyurethane which is spayed thinner and used as a top coat or a clear protective coat.

Edited November 18, 2017 by mikesc

[mikesc]

is spayed thinner and used as a top coat or a clear protective coat.

should read ..
is sprayed thinner and used as a top coat or a clear protective coat.
my speelchucker underlines everything in English.

ps..I forgot to say ..Very nice restoration there :)
and..
I agree with dikman..:) keep both..
and then get them some company..

Edited November 18, 2017 by mikesc

[dikman]

Gentlemen, thank you for a most interesting discourse on 2K paints. Whilst they certainly sound great from a durability perspective, after what mike has said I think I'll be giving them a big miss!

[Uwe]

Thank you @mikesc for that warning. Those isocyanates in 2K paints are a show stopper for me, too.

Edited November 18, 2017 by Uwe

[R8R]

3 hours ago, Uwe said:

Thank you @mikesc for that warning. Those isocyanates in 2K paints are a show stopper for me, too.

22 hours ago, BrownChicken said:

 

Hmm. I'm actually not scared for maybe occasional use. I spent years and years in a screen printing shop - I have a healthy respect but not much fear about coatings and solvents.

[mikesc]

Isocyanates are a whole different ball game compared to the solvents used in screen printing, the stuff used in screen printing ( even screen printing circuit boards ) needs long term exposure to do you harm ( mostly it is carcinogens, with some nasty stuff in the screen preps and washes )..isocyanates can get you on your first exposure if you breath them in..automotive painters and others who use them treat them with a great deal of caution.
I know of two people, within 50kms of my custom shop, who died in their spray booths because their mask cartridges were past their "do not use after"..
I was very ill twice due to defective mask cartridges..never did regain full lung capacity..when the activator is mixed with the polyurethane, what you have is a liquid plastic , it is then sprayed in vapour form ( very fine droplets ) , you breath it in and it goes hard, sets, in your lungs, deep down, it does not come back out, nor does it degrade, about the only thing that does degrade ( after years of exposure to it ) is UV light, and there is not much UV down inside the alveolae in your lungs..there are no "nice" molecules in 2 pack finishes.

[R8R]

By "healthy respect" I meant full tyvek protection, approved and well maintained respirators, proper ventilation, etc etc.

Then again I like it when machines look well used, so maybe I'll stick to a little steel wool and some wax for these old Singers I'm cleaning up here. 

[R8R]

Btw I remember back in the 80's when a common screen print chemical we used for de-hazing was caustic and would burn skin and dissolve eye tissue on contact. So yeah... healthy respect!