Coloured Coronation/Poppy $2

robbiegal · August 03, 2013, 05:36:21 PM

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!!

markn · August 03, 2013, 06:05:08 PM

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.

Fulvio · August 03, 2013, 07:33:10 PM

Only one way to find out, eh? And there's nothing quite like a romantic weekend at the mint, I reckon.

robbiegal · August 03, 2013, 07:46:51 PM

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

markn · August 03, 2013, 07:52:30 PM

http://www.google.com/patents/US7700158

trout · August 03, 2013, 08:55:01 PM

Quote from: 'markn' pid='23801' dateline='1375525350'http://www.google.com/patents/US7700158

I noticed that on the coin I De coloured :ok:

robbiegal · August 03, 2013, 08:55:50 PM

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

Fulvio · August 03, 2013, 09:27:57 PM

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?

Unicorn · August 04, 2013, 12:09:04 AM

What's that skip, they've been putting tacky wall panelling in your pouch!

ausjack · August 04, 2013, 07:06:04 AM

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

robbiegal · August 04, 2013, 07:55:11 AM

Quote from: 'Unicorn' pid='23820' dateline='1375540744'

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

markn · August 04, 2013, 08:03:35 AM

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?

Unicorn · August 04, 2013, 10:13:03 AM

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

ausjack · August 04, 2013, 10:46:19 AM

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:

robbiegal · August 04, 2013, 05:23:05 PM

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