Alternative title:  How Many Prints Could a Printer Print, if a Printer Could Print Prints?
By Tom Chambers

If you really just want an answer to take away and skip reading the rest of this article –  then figure a penny per square inch is what it will cost you for the ink to print sublimation*.  That’s a safe number that you probably won’t go wrong with, and your paper cost is simply the cost of a sheet of paper divided by how many items you get out of it.  If you’d like to know the “why and how” though, then read on.

One of the most common questions I hear at trade shows and over the phone regarding sublimation is “How many prints can I get out of a set of sublimation ink?”  It’s a great question that is asked in all sincerity, but one that is completely impossible to answer.  I will even go so far as to say that anyone that will tell you a specific number of prints in answer to that question either isn’t being truthful or doesn’t understand the question.  Why?   Because everyone and every design is different.  What you print and sell isn’t going to be the same thing that someone else prints and sells, plus you aren’t going to be printing the same exact design over and over again.  To illustrate this, here are a couple of basic examples.

Susie prints full color, full coverage 11” x 17” size paper prints for Vapor Apparel t-shirts on her SG800 sublimation system using extended ink cartridges**.  John on the other hand sells to souvenir shops, florists, does some custom work, uses standard size 8.5″ x 11″ paper on the smaller SG400 system, but prints a wide variety of name tags, belt buckles, ceramic tiles, the ever ubiquitous 11oz coffee mugs, and a few other products – all having different sizes, different types of art, and different levels of ink coverage.

In the two scenarios above, who uses the most ink?  How many t-shirt prints does Susie get vs. John when he prints name tags?  Any effort to answer the question would result in Susie having to print as many pages of a particular full page t-shirt design as she could before the ink ran out, and John printing out pages and pages of name tags until the ink ran out.  And the end result of this particular test would ultimately be useless against any future projections, unless Susie and John only ever printed that one design.  Apples and oranges comparisons like this never work.

The real problem here is with the question itself.  The one people should be asking, and the one that they really want the answer to anyway even if they don’t know it, is “What’s it going to cost me to print something?”  And THAT question has an answer – one that is based on 3 very simple principles and some pretty basic math.

  1. The Coverage Area: How many square inches are in your design?
  2. The Coverage Percentage: What percentage of the coverage area is printed?
  3. Designs Per Page: How many designs can you print on a single page?

Calculating this is a lot easier than it sounds, and the important thing here is to realize that it isn’t necessary to be absolutely precise – some rounding and fairly close guesses are perfectly fine.

First let’s figure out your coverage area.  To do that, take the overall height of the image and multiply it by the width of the image to obtain the area in square inches (or centimeters, if you are using metric).  You can even do circles the same way, just lower your coverage percentage estimate since the “corners” don’t really exist and are empty.

For any mathematicians out there that want greater accuracy with circles, the formula is A = π r2 (take half the diameter, times itself, times 3.14.)

For example, your design for an 11oz mug that measures 3.25” high x 8” wide would be 26 square inches.  Or, a 3” circle ornament or coaster would be 7.1 square inches.

Once you have the square inches in your coverage area, estimate your percentage of coverage based on a visual “best guess” of the amount of that area covered by your design.  Keep in mind that light, pale colors use less ink and are thus considered to be lower coverage, while darker colors are considered higher.  Open areas and white space are zero coverage.  Consider light coverage to be below 40%; medium is 40%-60%, and heavy is above 60%.

Next, multiply the square inches by $0.0075 (3/4 of a cent) for typical medium coverage designs.  For light coverage, use $0.005 (half a cent), or for heavy coverage, use $0.01 (one cent).

Assuming an average medium coverage design, the ink cost of our mug and ornament examples would be rounded to $0.20 cents and $0.05 cents, respectively.

Last but not least, let’s figure out what the paper cost is.  Using 8.5” x 11” paper, you can fit 3 of those mug designs on one page, or 5 of the 3” ornaments.  Based on the cost of a single pack of 100 sheets of our MPRES sublimation paper at $0.14 cents per page, your paper cost is under $0.05 cents per mug, or under $0.03 cents per ornament.

Add the paper cost to your ink cost, and that brings the total in ink and paper to $0.25 and $0.08 for your mug and ornament, and now you know what your items will cost you to print.  That’s it!

*All calculations used in this article are based on the market standard Sawgrass HD series sublimation ink for the Sawgrass Virtuoso SG400 and SG800 series of desktop sublimation printers.  Other printers, inks, and formats may result in different costs. 

**The extended size ink cartridges save approximately 25% in ink cost over standard ink cartridges due to their larger capacity and lower price per milliliter of ink.

Tom Chambers is EnMart’s sublimation guru,  the guide and mentor regarding all things sublimation.   Tom was instrumental in introducing inkjet sublimation to industrial laundries, and has been working with the process since the early days of thermal ribbon sublimation. 

2 thoughts on “How Many Prints Can You Get From a Kit of Sublimation Ink?

  1. Just need to know if you are using 8.5×11 full color sheets on every run, how many pages of full color sheets can the sawgrass 400 print out. Cost per sheet means nothing if you don’t have an estimate as to how many sheets can be printed off the machine.

    Like

    1. As it states in the article, that is an impossible question to answer unless you take a specific design and start printing it with a full set of ink and see how many pages you get before it runs out. Each different design will use a different amount of ink, even if it’s full coverage and the same size page, and the cartridges won’t run out at the same time either.

      Using the article, if you take an 8.5″ x 11″ sheet of paper and assume a 1/4″ margin around all edges, that’s a printed image size of 8″ x 10.5″. Multiplied together, that’s 84 square inches.

      For a light coverage print, that means you’re using about $0.42 cents worth of ink; medium coverage would be around $0.63 cents, and a heavy coverage print would be around $0.84 cents.

      Then you add the cost of a sheet of sublimation paper to that, which in the case of our MPRES paper in size 8.5″ x 11, it would be another $0.14 cents. So your final cost per design would be from $0.56 to $0.98 cents depending on how heavy your coverage is.

      If you’re just trying to figure out how much ink to order for a particular run of designs, then in theory, you could take your estimated ink cost per page and divide that into what you paid for a set of ink, and come up with an approximate number of pages you would get out of your kit.

      A kit of Sawgrass SG400 ink costs $340, so if you divide that number by the heavy coverage option of $0.84 cents in ink per page you get around 405 pages from the 4 cartridges – IF you somehow managed to print exactly the the right amount of ink from each one so you could use it up equally and run out of all 4 at the same time.

      That is a largely meaningless number though because each cartridge isn’t going to run out at the same time, and you may wind up using 1.5 or 2 cartridges of magenta or cyan to 1 cartridge of black or yellow (for example).

      The article was more addressed to the question most people really want to figure out though, which is the one of “how much does it cost me to print x” so that they can in turn figure out how much to charge for it.

      Like

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s