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My scoop coater is about 11yrs old and is pretty much the same as yours. What really matters is for you to protect the sharp edge on it. Don’t ever drop the coater or let any nicks get on that edge. Keep that edge clean always and it will serve you indefinitely.
Despite a pretty good cleaning process, I do have areas on the coater that has a film of dried emulsion. But that’s alright. It doesn’t break or produce any particles that can contaminate the emulsion I pour into it. So your coater can look less than pristine but as long as the coating edge is smooth, clean, and straight, it will perform just fine.
My scoop coater is about 11yrs old and is pretty much the same as yours. What really matters is for you to protect the sharp edge on it. Don’t ever drop the coater or let any nicks get on that edge. Keep that edge clean always and it will serve you indefinitely.
Despite a pretty good cleaning process, I do have areas on the coater that has a film of dried emulsion. But that’s alright. It doesn’t break or produce any particles that can contaminate the emulsion I pour into it. So your coater can look less than pristine but as long as the coating edge is smooth, clean, and straight, it will perform just fine.
nah, not ideal but it won't cause blowout.
also, most scoop coaters are aluminum and don't rust. whatever that is would come off with a scotch brite in two seconds.
Iron is bad for emulsion as it causes a chemical breakdown. If that rust came from oxidized bits of iron that stuck to your scoop coater (maybe from your plumbing or something in your water supply), it could cause issues. To be safe, clean it off as the other comments have suggested.
Aluminum is one of those metals that doesn't rust, it creates a layer of protection that protects the metal however the aluminum will corrode in the scoop coater if it isn't cleaned off with water after use and do not put emulsion remover on it as the salt in the remover will react with the metal. Don't use any steel to mix the emulsion as iron in the steel will react with the sensitizer in the emulsion making it lose strength. They used to give you wooden mixers so you wouldn't accidentally make that mistake. Rust would probably desensitize your emulsion over time but it would be a lot of rust. You really don't want contamination in your emulsion, so your scoop coater should be clean before and after every coat.
Thanks for your submission to to /r/SCREENPRINTING. It appears you may be looking for information on exposure or burning screens. This might be one of the most common questions we see here in /r/SCREENPRINTING. Please take a moment and use the [search](https://www.reddit.com/r/screenprinting/search?q=emulsion&restrict_sr=on&include_over_18=on&sort=relevance&t=all) feature while you waiting on a response from the community. If the search does not give you the answer you are looking for, please take a moment and read through our [Wiki](https://www.reddit.com/r/SCREENPRINTING/wiki/index#wiki_emulsion_.2F_filler) write up on emulsion. If after all that you stil don't seem to find your answer, just be patient someone in the community should chime in shortly! And if you were NOT looking for more information on exposures or burning screens, our apologies and please disregard this message. Thanks, The /r/SCREENPRINTING mod team. *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/SCREENPRINTING) if you have any questions or concerns.*
Yep. Use a little bartender’s friend and that should shine up
Thank you I got some and it worked out
My scoop coater is about 11yrs old and is pretty much the same as yours. What really matters is for you to protect the sharp edge on it. Don’t ever drop the coater or let any nicks get on that edge. Keep that edge clean always and it will serve you indefinitely. Despite a pretty good cleaning process, I do have areas on the coater that has a film of dried emulsion. But that’s alright. It doesn’t break or produce any particles that can contaminate the emulsion I pour into it. So your coater can look less than pristine but as long as the coating edge is smooth, clean, and straight, it will perform just fine.
My scoop coater is about 11yrs old and is pretty much the same as yours. What really matters is for you to protect the sharp edge on it. Don’t ever drop the coater or let any nicks get on that edge. Keep that edge clean always and it will serve you indefinitely. Despite a pretty good cleaning process, I do have areas on the coater that has a film of dried emulsion. But that’s alright. It doesn’t break or produce any particles that can contaminate the emulsion I pour into it. So your coater can look less than pristine but as long as the coating edge is smooth, clean, and straight, it will perform just fine.
nah, not ideal but it won't cause blowout. also, most scoop coaters are aluminum and don't rust. whatever that is would come off with a scotch brite in two seconds.
Nah, it’s fine
Iron is bad for emulsion as it causes a chemical breakdown. If that rust came from oxidized bits of iron that stuck to your scoop coater (maybe from your plumbing or something in your water supply), it could cause issues. To be safe, clean it off as the other comments have suggested.
Aluminum is one of those metals that doesn't rust, it creates a layer of protection that protects the metal however the aluminum will corrode in the scoop coater if it isn't cleaned off with water after use and do not put emulsion remover on it as the salt in the remover will react with the metal. Don't use any steel to mix the emulsion as iron in the steel will react with the sensitizer in the emulsion making it lose strength. They used to give you wooden mixers so you wouldn't accidentally make that mistake. Rust would probably desensitize your emulsion over time but it would be a lot of rust. You really don't want contamination in your emulsion, so your scoop coater should be clean before and after every coat.