Rank: New forum user 
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I am currently writing a risk assessment for R-Type ink. The main chemical used in the ink is
4-hydroxy-4-methylpentan-2-one. The company want to use the ink to mark company ID onto wooden pallets.This chemical is Harmful. One of the engineering controls is to use explosion proof LEV. does any one else use this chemical if so what control measures do you have in place?
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Rank: Super forum user 
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You are going to need to elaborate...
On amounts, how it's used, duration of exposure etc etc... I am assuming it's a bit like acetone - I am only guessing but if my chemistry skills aren't to rusty it's the acetone group on a short carbon chain? So I'm guessing it's a solvent with similar controls ? I'm saying this as maybe asking for controls for acetone will get you more replies... but be warned even though similar they may be very different!!
Also
Is it a known sensitiser, does it have a WEL?
This question is too hard for a Friday :)
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Rank: Super forum user
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How much are you using, what proportion of the ink is solvent, how do you apply it and whereabouts do you use it? How does the ink dry? With a flash point of 58C and probable ml (rather than litre) quantities I wouldn't have thought you'd have a need for zoning and Ex rated equipment unless you are drying large quantities in an oven...
BUT - if you already have an FFI notice for material breach of DSEAR (which one of my clients did in similar circumstances last year) then you may find you've got to jump through the hoops just to prove there is no significant risk...
Steve
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Rank: Super forum user
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“Is it a known sensitiser, does it have a WEL?”
Yes it’s got a WEL- Risk Phrase is R 36 ‘Irritating to eyes’ Long term exposure Limit- (8 hours) = 50 ppm and STEL 75 ppm. That’s in my copy of EH40 (which might be out of date)
Does this help you? I don’t know but I’d have a good look at the SDS and look at things like flash point as well. You have to think about
• Storing it
• Handling it
• Using it
• Disposing of anything left over
• Level of ventilation in the area where you are using it. Can it build up to a level approaching the STEL? Remember as it has a STEL you have to keep the level as low as reasonably practicable not just below the STEL.
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Rank: Super forum user 
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Or you could use a water-based ink? Shouldn't be a problem on wooden pallets.
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Rank: Super forum user
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SDS's are authored such that it does not take into account whether you use a few millilites or cubic metres and how you use it.
That is why we have General, COSHH & DSEAR assessments.
As indicated by Steve, unless there is more information, regarding the quantities used, the method of tranferring the ink from the container to the applicator, the method of applying and then curing the ink----all factors will influence the assessment.--otherwise we are simply speculating
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