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Re: Scratchbuild reinforcement..

Posted: Tue Feb 21, 2017 2:25 am
by Estnische
MEK is hazardous - check a safety data sheet. If you insist on using it, wear the right respirator with an organic vapour (e.g. solvent) filter that works, ventilate your work area and avoid contact with skin. Sensible precautions really - anyone with half a brain wouldn't use 2 pack enamel without the right systems, so why not treat MEK with the same caution?

I accept the risks of riding a motorbike because its fun and I restrict the risks. MEK is not my idea of fun.

This product has the potential to cause adverse health effects. Use safe work practices to avoid
eye or skin contact and inhalation. Over exposure to methyl ethyl ketone (MEK) in combination with certain other
solvents (eg n-hexane) may result in peripheral nerve damage. Chronic exposure to some solvents may result in
central nervous system (CNS), liver and kidney damage.

Harmful. Ingestion may result in nausea, vomiting, abdominal pain, diarrhoea, dizziness and drowsiness.
Aspiration may result in chemical pneumonitis and pulmonary oedema.

Wear splash-proof goggles, barrier gloves and coveralls. Where an inhalation risk exists, wear: a Type A (Organic
vapour) respirator. If spraying, wear: a Type A-Class P1 (Organic gases/vapours and Particulate) respirator.

Re: Scratchbuild reinforcement..

Posted: Tue Feb 21, 2017 7:58 am
by Tiggr
pebblemonkey73 wrote:I just use the "Baufix" thinners that I can get in ALdi it comes in a 1L tin, it contains Butan1ol (and some other interesting ingredients), I use it to strip the paint of pre-painted parts and for cleaning my airbrush out.

Matt
Good tip Matt
Must get some. :thumbup:

Re: Scratchbuild reinforcement..

Posted: Tue Feb 21, 2017 10:01 am
by 43rdRecceReg
:eh: Well, thanks Matt, Estniche, Gary, et al for your respective takes on adhesive downsides. I raised the topic of bonding agents before and, given the nature of rc modelling, it has to be a key concern for all involved in it. Staying healthy and/or alive is another. Maybe the subject deserves its own spot in the "Builds and Mods', or 'Reference materials'. Perhaps even an ongoing reference/ review guide could be inserted for bonding agents and techniques..maybe with product reviews?). Having trawled the 'Net, with a net, for slippery topics (those with no easy answers :S )- and bonding plastics and dissimilar materials is one of them- there's a lot of contradictory stuff out there. The MEK risk is just one. The UK Gov says it's Ok, Estniche says it isn't, and Southern California agrees with him...but not necessarily on motorcycling, Wingsuit and Base Jumping, teasing crocodiles etc.,. They have banned or placed restrictions on most VOC solvent types according to this:
http://www.popularwoodworking.com/techn ... t-solvents
and this earlier discussion (2011):
https://www.thevespiary.org/rhodium/Rho ... 71.20.html
I also read some where that the formula for the Revell Contacta Pro I've been using is different in Europe, and more effective than that in the US. Maybe then, it- the UK version- has some noxious chemical in it that might lead to lawsuits in the US (where the 'compensation culture' was born.. :shh:). Separating genuine concern for the hobbyist's and craftsman's health, from the threat of potential litigation is very tricky. After the lies about toughened glass, asbestos, and smoking..or even in the early 20th century the 'health benefits' of drinking radon water ( :lolno: :lolno: ) where manufacturers interests, money, and the spread of globalisation topped any health angle (see: http://www.popsci.com/scitech/article/2 ... -radiation) it's getting harder to sort fact from fiction. It's also getting harder to find the best adhesive for the job; one where a visit from the Grim Reaper isn't a potential consequence :O
Having spent days looking at modeller's forums, there's a lot of contradictory stuff out there on products. For the moment, I'll stick (pun intended) with the Revell; quick weld-tacking outdoors with EMA; and for reinforcement with 'Plastic Fusion' two-part super glue as recommended by this styrene wizard on youtube. I recommend this tutorial for newbies who have not worked with styrene before (like Moi!) :thumbup: :
phpBB [video]

Re: Scratchbuild reinforcement..

Posted: Tue Feb 21, 2017 11:26 am
by HERMAN BIX
I know that industrial paint is a lot less protective in the U.S. than its comparable counterparts............Schramm Red goes pink in short order :{

Mr 43RR...........do you smoke ?

A- Yes, in that case why care now about noxious fumes from a glue or paint ?
B- No...........do what you can, where practicable, to minimise exposure to anything that could otherwise shorten your innings, like you did when you decided not to smoke. ;)

Either way, I trust the scratchbuild will go well and last longer :thumbup:

Re: Scratchbuild reinforcement..

Posted: Tue Feb 21, 2017 8:25 pm
by 43rdRecceReg
HERMAN BIX wrote:I know that industrial paint is a lot less protective in the U.S. than its comparable counterparts............Schramm Red goes pink in short order :{

Mr 43RR...........do you smoke ?

A- Yes, in that case why care now about noxious fumes from a glue or paint ?
B- No...........do what you can, where practicable, to minimise exposure to anything that could otherwise shorten your innings, like you did when you decided not to smoke. ;)

Either way, I trust the scratchbuild will go well and last longer :thumbup:
Er..'B'., Herman, in answer to your question. I gave up the dread cancer sticks, and related substances, more than 35 years ago. As a kid in the 50s, you couldn't see a cinema screen for smoke, domestic ceilings were yellow, and most adults (those who'd
just come through the war, more or less intact), seemed to have yellow/brown finger tips from Woodbines, Senior Service, and Capstan Full strength ( but looked like they'd been checking the status of their 'piles :shh: ).
Luckily, I survived that intensive passive smoking period.
Thus with my long discovered freedom from vice (even took a booze break for 23 years..because of ulcer problems!), I intend to make this finish this Cromwell..WARTS and all (Check out Oliver's portrait :lolno: )..and in Life terms- hit a ton, not out (and with no Umpire's video review calls! :haha:
A few days from now, I'll start the thread.

Re: Scratchbuild reinforcement..

Posted: Wed Feb 22, 2017 7:30 am
by Raminator
MSDS documents and California's Proposition 65 warnings are a bit over-alarmist, and a lot of manufacturers just take the path of least resistance.

I've got some of the proper (made-in-Germany) Revell Contacta here, I might try running some at work to find out exactly what is or isn't in it. Either way, it's great stuff and I swear by it.

Re: Scratchbuild reinforcement..

Posted: Thu Feb 23, 2017 12:13 am
by 43rdRecceReg
Raminator wrote:MSDS documents and California's Proposition 65 warnings are a bit over-alarmist, and a lot of manufacturers just take the path of least resistance.

I've got some of the proper (made-in-Germany) Revell Contacta here, I might try running some at work to find out exactly what is or isn't in it. Either way, it's great stuff and I swear by it.
I'd swear by it too, and not because of it, Ram. I'd be interested to learn what you make of it at 'work' (some sort of Lab., is it?..but not the "Breaking Bad sort'.. I trust :lolno: )

Re: Scratchbuild reinforcement..

Posted: Thu Feb 23, 2017 9:54 pm
by Estnische
I think you have to take into account that the risks for the individual are about whether you are genetically predisposed to suffering from the effects of the chemical. As Raminator says, manufacturers have to play it conservatively. There are plenty of instances where people have smoked all there lives and lived long lives. Also enough cases where non-smokers suffered from passive smoking. Same with asbestos workers being disease free but their spouse contracting cancer from shaking out his dusty overalls. If you are confident that you are blessed with the 'right stuff' then don't take precautions.

Re: Scratchbuild reinforcement..

Posted: Fri Feb 24, 2017 5:45 am
by Raminator
43rdRecceReg wrote:
Raminator wrote:I'd be interested to learn what you make of it at 'work' (some sort of Lab., is it?..but not the "Breaking Bad sort'.. I trust :lolno: )
Some of the glassware we have has only two potential uses; the analysis we perform, and making meth. :shh: