This is not my idea so I can't take the credit. But how (in the process) is the purple paint applied. Is it possible to get a coin with purple on the obverse?? Food for thought.....
The coin would have to be flipped in the pad printing process either error , mint sport or God forbid some silly bugger pad printing "Post Mint".
I do know that the area pad printed on a standard coin has a different finish to the rest of the coin.
I am unsure if the ink would stick to the uneven surface on the obverse properly.
Are we talking the "C" mintmark or the RSL coin here?
"Show and Tell" time :)
Think about the coronation purple coin. When in the process is the paint applied. Is someone standing there turning all the coins the right way up going into the colouring machine? Don't think so. I'm not sure either that it's a pad printing process. I don't know.
it's the underpants gnomes
they come out late at night and after hiding the underpants so that you can't find them in the morning when you're getting dressed for work
...... they also paint the coronation coins purple
Quote from: 'purplepennyhunter' pid='23690' dateline='1375441708'Think about the coronation purple coin. When in the process is the paint applied. Is someone standing there turning all the coins the right way up going into the colouring machine? Don't think so. I'm not sure either that it's a pad printing process. I don't know.
I don't know either PP, But what an interesting question :good:
Maybe it's done directly after the coin is stamped and they should know its orientation (the obverse and reverse dies have a defined slot in the press I assume).
Quote from: 'robbiegal' pid='23691' dateline='1375441815'hiding the underpants so that you can't find them in the morning when you're getting dressed for work
Ewwwww.. I just got this mental image of RG going to work commando....
I may never recover from this... :dodgy:
Anyways...
Here's how the Perth Mint does their CMYK process:
http://blog.perthmint.com.au/2011/06/24/how-does-the-perth-mint-colour-coins/
RAM would be similar but higher-speed machinery, using only a couple of colours at this stage
(purple and clear). Presumably there is an automatic coin flipper as well. No way will there be any manual handling of millions of coins. If there were examples printed on the wrong side, we would have seen them by now, surely?
But it does beg the question of bag marks
under the paint. We've seen what a hard life coins lead from the moment of striking, and the lack of quality control elsewhere wouldn't seem to indicate any gentler handling of these, would it?
Oh, and why not just wander down to the mint and have a look?
QuoteOh, and why not just wander down to the mint and have a look?
I would love to mate but the only time I am in perth I am working 12-14 hrs a day ( The last ANDA Show attendance screwed me up for a couple of days) Night Shift.
Otherwise I will travel there from home to get on a plane to other destinations for work.
I had about 80 days off last year (including Weekends) at intervals of 1-3 days at a time, Mrs Trout understands my love for coins , But that would turn to mud if I decided to use one of my breaks just to see how the pad printing process works :ok:
take mrs trout with you
have a romantic week-end ... in the motel that's just up the road from the mint
Quote from: 'robbiegal' pid='23703' dateline='1375445958'take mrs trout with you
have a romantic week-end ... in the motel that's just up the road from the mint
Jesus RG we are both nearly 60.
A romantic weekend for us is weeding the garden together or simply just hanging out Mate :ok:
Conning My Best mate into going to Perth Just to look at how a coin is painted won't work, I totally admire and appreciate that She lets me do as I wish with my coin collecting and I don't want to push my luck :ok:
QuoteI totally admire and appreciate that She lets me do as I wish with my coin collecting
:heart::give_rose::drinks:
Good on ya Trout!
Quote from: 'Fulvio' pid='23698' dateline='1375443022'Here's how the Perth Mint does their CMYK process:
http://blog.perthmint.com.au/2011/06/24/how-does-the-perth-mint-colour-coins/
RAM would be similar but higher-speed machinery, using only a couple of colours at this stage (purple and clear). Presumably there is an automatic coin flipper as well. No way will there be any manual handling of millions of coins. If there were examples printed on the wrong side, we would have seen them by now, surely?
But it does beg the question of bag marks under the paint. We've seen what a hard life coins lead from the moment of striking, and the lack of quality control elsewhere wouldn't seem to indicate any gentler handling of these, would it?
Oh, and why not just wander down to the mint and have a look?
They would want to speed up that process. It's going to take a while to do 2 million.
Quote from: 'trout' pid='23704' dateline='1375446643'Quote from: 'robbiegal' pid='23703' dateline='1375445958'take mrs trout with you
have a romantic week-end ... in the motel that's just up the road from the mint
Jesus RG we are both nearly 60.
A romantic weekend for us is weeding the garden together or simply just hanging out Mate :ok:
Conning My Best mate into going to Perth Just to look at how a coin is painted won't work, I totally admire and appreciate that She lets me do as I wish with my coin collecting and I don't want to push my luck :ok:
love and passion have no age barriers mate!
let her know that too
keep the fires burning and at our ages - maybe on the long week-ends, let them go to raging hot!!
I'm not goin there :mocking: but I know he'll get in big trouble if there's not enough wood there to stoke the fire..and that's firewood for the fire people, you lot make me wonder :laugh2:
I did actually mean RAM, not PM. We've seen PM's gear, which is only used for small runs. RAM went with high-speed equipment so they could churn out millions. They tested it with the poppies, went into full production with coronations, and will likely ramp it up in future. That machinery is not insubstantial, and should be clearly identifiable from the public gallery, just like the robot they installed a few years back. There might even be a display set up, or somebody willing to answer questions. :angel:
I could go over and have a look see
not sure what i'd see though as i'd say those babies are all minted by now
ps
I could take the hubby for a romantic week-end at the Hyatt just up the road and then take him for a romantic stroll hand in hand ..... over to the mint ha ha!!
I think you'll find there's a lot of material handling between actually minting the coins and applying the colour which would explain the bag-marks. Certainly at least a cleaning process to remove solvents and oil before printing. And based on some close examination of the purple $2 without paint on it I've got here I'd bet a fair amount there's a grit or sand blasting process applied to the area where the paint is likely to adhere. So, the coins are minted->grit blasted->cleaned. The grit blasting line would have to be automated to orient the coins correctly.
Once that was done the coins would be taken to a painting line that would most likely include an optical device to get the correct side showing before printing. Then into a printer, most likely on a rotary bed so it can print multiple coins at once. The ink is likely to have an extremely volatile solvent and the coins would then run through a short heat tunnel where they would dry in just a few seconds. From the heat tunnel to another rotary printer that would apply a clear coat, this would have a different but equally volatile solvent and then probably into another heat tunnel. Depending on how far they take things I wouldn't be surprised if there's a vision system to check the quality of the application of the colouring that automatically rejects duds.
I doubt the grit blasting and cleaning processes are in the main minting hall. I'd also wonder whether the paint line would be in the main minting hall either. They wouldn't want too many particulates in the air to stop ink contamination. I think they'd use an inkjet or piezo electric printer of some type.
Only one way to find out, eh? And there's nothing quite like a romantic weekend at the mint, I reckon. :)
yep yep
fortunately the honey hubby is also a collector so he'd be butter in my hands
plus we often bump into the odd mint employee at the shops so we might be about to find out some more too
http://www.google.com/patents/US7700158
Quote from: 'markn' pid='23801' dateline='1375525350'http://www.google.com/patents/US7700158
I noticed that on the coin I De coloured :ok:
jeepers Mark
we are here ripping off half a house full of tacky 1990's wall wood grain panelling , already filled a skip
i'm all for a condensed version
Quote from: 'robbiegal' pid='23807' dateline='1375529150'i'm all for a condensed version
They rough up the surface so the paint will stick and not flake off in people's pockets. Well, not entirely at least... :)
Mark, I thought the RAM said they developed their own process, since they didn't like the Canadian way of doing it?
(http://www.australian-coins.net/gallery/albums/userpics/11067/skipp.jpg)
What's that skip, they've been putting tacky wall panelling in your pouch!
sorry skip, they're out and I missed this one..nice price http://www.ebay.com.au/itm/2013-2-60th-Coronation-purple-coin-ERROR-COIN-/111128099962?pt=AU_Coins2&hash=item19dfc03c7a#ht_245wt_988
Quote from: 'Unicorn' pid='23820' dateline='1375540744'(http://www.australian-coins.net/gallery/albums/userpics/11067/skipp.jpg)
What's that skip, they've been putting tacky wall panelling in your pouch!
that's gorgus Unicorn!!
as kids, we'd run up to the neighbours house to watch skippy on their television
got hundreds of them here
yeah - lived in this house for 14 years 10 years as tenants - bought it 4 years ago
and we have finally started some renovations now that my job security situation has changed
so the hubby was armed with his bunning's funny looking thingee for ripping skirting board etc off
and he hit the walls like a pack of salts
the place looks horrible now - I cried & there is still more to come off
I was a bit over whelmed by the chaos and the mess that the glue made after ripping off the paint on the interior gyprock walling boards - very Andy Warhol ATM
he did re-assure me it will be different in a month ... or two
we went to the masters home building place yesterday and have the kitchen team booked in, so the 1974 kitchen is gonna go
Quote from: 'Fulvio' pid='23814' dateline='1375531077'Quote from: 'robbiegal' pid='23807' dateline='1375529150'i'm all for a condensed version
They rough up the surface so the paint will stick and not flake off in people's pockets. Well, not entirely at least... :)
Mark, I thought the RAM said they developed their own process, since they didn't like the Canadian way of doing it?
I wonder how different it was. For example, the "macropores" described in the patent. It looks like the RAM decided to make these part of the coin design rather than just pressing in dimples or some other feature. For example, on the remembrance $2 the "macropores" are the words "remembrance" being repeated over and over. On the purple $2 it's the two rings in which the coloured stripes sit.
By the way, the finish on the remembrance lettering is quite different on the coloured version when compared with the non coloured version. Sand/grid blasted again?
Sounds like a big job Robbiegal!!
(Hope you had it checked for asbestos before the pack of salts!)
Quotethe 1974 kitchen is gonna go
Any orange & brown ?
Yes, skip was on my daily watching agenda while it was on!
Oops, got distracted again .... coloured coins ..... coloured coins
in the good old days of 2 stations, oh the memories :winkextra: and it's still on or should I say they've put it back on as everything old is new again :blink: and I hope your going to put all that retro stuff on feebay RG, might even help pay for the reno's :good:
Quote from: 'Unicorn' pid='23843' dateline='1375576983'Sounds like a big job Robbiegal!!
(Hope you had it checked for asbestos before the pack of salts!)
Quotethe 1974 kitchen is gonna go
Any orange & brown ?
Yes, skip was on my daily watching agenda while it was on!
Oops, got distracted again .... coloured coins ..... coloured coins
kitchen, no not orange but lots of brown and sunflower tiles (which I really like)
would have been very modern in it's day and a common kitchen in these suburbs
yes we have had an more expert opinion yesterday
we got a carpenter builder friend around after the hubby started just to be sure, he reckons it's gyprock panelling
I also had some blokes around a couple of years ago about stuff on the outside and the garage
sorry - off topic etc etc
Phew, thank goodness Robbiegal!
Be careful of the bathroom / laundry walls though (they still used asbestos for wet areas right up to the early 1980's).
Brown with sunflowers!!!! I can visualise ...... cool!
Let me know how the Master's kitchen turns out! (Bet you can't wait).
yeah
we have it pretty well confirmed
we even checked out the carpet before we removed it they used to use the recycled asbestos bags for carpet backing - can you believe that?
eves, laundry and maybe bathroom - as the bathroom was renovated about 17 years ago so it may have been done, so we need to get the testing done
I am taking lots of photos
it should be good
just a hell of a mess and it's doing my delicate brain in
I has informed the hubby that i'm gonna hide up this end of the house when I am at home - the tidy end!
sorry :off_topic:
Hey Uni, if you'd like me to tape skippy for ya it was on last night on NBN :) and here's a link, click friday and scroll down to about 3:30am http://www.nbnnews.com.au/theguide/tvguide.php?signal_market=nbn_newcastle_hunter&schdate=2013-08-09
Lol ..... I've been meaning to watch that, I caught a glimse of it one night a while back. Good on ya Sonny ...... now ask Skip where he's hidden the damn mail .....
do ya really won't know :stinker: why do you make me do these things Uni :laugh2: