HomeUS CoinsThe Coin Analyst: U.S. Mint’s New Laser Frosting Technique Pushes the Envelope...

The Coin Analyst: U.S. Mint’s New Laser Frosting Technique Pushes the Envelope in Coin Design Process

by Louis Golino for CoinWeek ………

Modern U.S. numismatic coins have until recently tended to be more conservative in their use of newer technologies. But major change is brewing at the U.S. Mint today.

Steve Antonucci, who serves as branch manager for digital process and development at the U.S. Mint facility in Philadelphia, is at the center of a major push by the Mint to use new laser technologies and computer software to significantly enhance the coin design process and make coins more visually appealing by making the various details of the designs more distinctive from each other.

In a telephone interview with CoinWeek, Mr. Antonucci explained that customer feedback in recent years frequently asked why U.S. Mint proof coins using laser frosting were resulting in the loss of significant details on coins. An example would be the obverse of proof America the Beautiful quarters in which the details on President Washington’s portrait are obscured.

laser_coin_frostMr. Antonucci explained that the reason is that the intensity of the laser was so high on those coins that it created surface roughness and absorbed light. He also said that the Mint’s artists and sculptors were just as disappointed with this situation as collectors were.

About a year ago when he assumed his current position after a decade working on the digital process at the Mint, Mr. Antonucci was tasked to find a solution to this problem. In late 2012 he was asked what upcoming projects could be used to help develop an alternative laser frosting process, and he said the 2013 Five-Star Generals commemorative program, specifically the proof coins, were an excellent candidate for that effort.

As the photos and images provided to the numismatic press by the Mint show, the areas of the proof versions of the $5 gold and silver dollar coins in that program that use the new laser frosting technique really make the details much more distinctive, such as on the portraits of Generals Marshall and Eisenhower on the silver dollar obverse. Another example is the ornament on the lamp on the reverse of the coin. These details almost “jump out” and look much more life-like than for example the detail on the obverse of the uncirculated versions of these two coins.

In recent years as the Mint has explored the use of alternative technologies, it has consulted with officials at foreign mints that work in these areas. In particular, the Royal Canadian Mint  and Perth Mint  have been issuing numerous innovative coins using new approaches, which the Mint has taken note of. In fact, the U.S. and Canadian Mints currently use the same type of lasers, which the American Mint purchased in 2005.


I also asked if there is any connection between the development of the new laser frosting technique on proof coins and the new enhanced uncirculated American silver eagle that will be included in the upcoming West Point silver eagle set slated to be released on May 9.

Mr. Antonucci responded that although his team’s project has a different focus where the most important things are die life and the fidelity of detail, a laser specialist from his team was sent to the West Point Mint to help with development of the new silver eagles with multiple finishes , which he refers to as “reverse brilliant uncirculated” coins. Even though the West Point team was developing a different approach, they were using the same basic technology and applying it to different elements of the designs of the respective coins.

That gets to the heart of the new laser frosting techniques being developed for proof coins. And that is that “while every coin design is its own animal, requiring its own analyses,” the plan is to keep trying different approaches based on the art work and the level of detail.

For example, the national parks quarters and five-ounce silver coins frequently use landscapes of the parks they are honoring as the design of the reverse of the coin. Michael White, the Mint’s spokesman explained that at meetings he has attended of the CCAC, the Citizens’ Coinage Advisory Commission , commission members will often ask when reviewing such designs how will the Mint emphasize different design elements and make, for example, the trees look different from the water in the design.

A big part of the answer is to explore the use of different laser frosting techniques to add “visual intensity to the coins,” and to have the Mint’s coin artists and sculptors thinking about these issues during the coin design process. As Mr. Antonucci said, the new technologies should drive the coin design process and vice versa.

In addition, moving forward, his team will be exploring the use of different laser frosting intensities to develop different looks on coins. There is no fixed number of frosting intensities, and Mr. Antonucci said he foresees that as many as seven could be used at some point. The main current obstacle to doing that is that in some cases the computer software may not yet exist and would need to be developed.

The Mint has not made any final decisions on which coins will use the new technologies in the future, but collectors can expect to see them used on various numismatic and commemorative coin programs.

During a telephone conference last week with members of the numismatic press, Mr. Antonucci said that he is also exploring the possibility of having the Mint keep the experimental strikes used in the process of developing these new approaches. Normally they are destroyed, but he said he would “hate to lose visual reference to that coin” since it would be so useful to the team of artists and sculptors at the Mint to have them in hand as they think about and work to develop new coin designs. This is another example of his idea of the technologies and coin design process working together in a symbiotic way.

Collectors should check out what the new proof coins of the Five-Star General program look like in person, and see what they think of the new laser frosting technologies.

Louis Golino is a coin collector and numismatic writer, whose articles on coins have appeared in Coin World, Numismatic News, and a number of different coin web sites. His column for CoinWeek, “The Coin Analyst,” covers U.S. and world coins and precious metals. He collects U.S. and European coins and is a member of the ANA, PCGS, NGC, and CAC. He has also worked for the U.S. Library of Congress and has been a syndicated columnist and news analyst on international affairs for a wide variety of newspapers and web sites.

Louis Golino
Louis Golino
Louis Golino is an award-winning numismatic journalist and writer specializing on modern U.S. and world coins. He has been writing a weekly column for CoinWeek since May 2011 called “The Coin Analyst,” which focuses primarily on modern numismatic issues and developments at major world mints. In August 2015 he received the Numismatic Literary Guild’s (NLG) award for Best Website Column for “The Coin Analyst.” He is also a contributor to Coin World, where he wrote a bimonthly feature and weekly blog, and The Numismatist, the American Numismatic Association’s (ANA) monthly publication, where he writes a monthly column on modern world coins. He is also a founding member of the Modern Coin Forum sponsored by Modern Coin Mart. He previously served as a congressional relations specialist and policy analyst at the Congressional Research Service of the Library of Congress and as a syndicated columnist and news analyst on international politics and national security for a wide variety of publications. He has been writing professionally since the early 1980s when he began writing op-ed articles and news analyses.

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  1. Louis,

    A very interesting piece. Do you know if this technique is going to be applied to all proof coins going forward, or are they still experimenting? I had the impression from one of your paragraphs near the end that this is still in the experimental stages and they are still doing things like tweaking frosting intensities.

  2. Thanks, CO. No decisions have been made yet on which coins will have it, but as I mentioned, you can expect to see it used with different intensities on future coins.

  3. I think this is a good idea for the mint to bring in some fresh new technology into our coin collecting world. This is the 21st century, and attention to detail is everything these days. Will the mint try coloring coins next?

  4. Laser Frosting is an evil- no one speaks of the fact that in the past 20 years circulating American coins suffered an incredible diminution of artistry! – A 50+ per cent loss of available relief depth in obverse portraits is exemplary of the declining artistic standards, when an expedience for flat background prevailed over the previously uniquely-American concave backgrounds that provided for a higher possible relief of presidential busts. 

    Perhaps the officials concerned with coin production at the US mint forgot – or even worse- are no longer aware- what that uniqueness in relief depth actually stood for: only one other country ever minted coins of such sculptural beauty – ancient Greece, the original cradle of democracy! And so it came to be, for someone like me born in repressive regime of the Soviet Union, that circulating US coins from 1970’s that I saw, stood aesthetically apart from the flat coins from the rest of the world. As a child collector back then, I made a connection that democracies had sculptural coins, while the rest of the world had flat, busy, graphically-driven coins… 
    Not any more- current US circulating coinage is on par in terms of flatness to Euro, Russian Rubles, etc. That is a regress. 
    So much re. laser frosting that heralds an ascendance of ever flatter, ever more graphic and busy designs…
    I just hope US mint will not inspired by laser exploits of Canadian Mint into producing colored coin-crap. 

    The true masterpieces of coinage- the circulating quarters and nickels from 1970’s are slowly disappearing from circulation. Thus, Roosevelt’s legacy is fading, and any artistic and symbolic appreciation of coin design is fading with it. 
    A great pity, – heralding the new age – an age when US circulating coinage is no longer American in spirit. It is all surface, and no longer (sculptural) substance. A pity indeed! (if I had his email- I would email this to Mr. Antonucci as well). Regards, Yuri

  5. Let’s try to figure out how to use new technology to get the relief back rather than yet another surface treatment. Relief, either in coins or elsewhere, is a sculptural expression, and making coin more beautiful means making it more sculptural, not busier (which multiple surface treatments tend to do) 


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