QFor color measurement condition M0, suppose we have selected D50 / 2 deg / no filter / abs setting. Is this possible since M0 is a candescent illuminant? Also, what is the role and is it necessary to use density filters Status E I T etc.?
A Thank you for reading our tech tip and for your questions.
When doing research for the tech tip, I was perplexed by the same question. How can we select the D50 illuminant condition when the instrument only contains an incandescent illuminant that approximates CIE illuminant A? I called one of the major color measurement equipment manufacturers and was told that the D50/2°/UV included selection was a colorimetric computation methodology. In other words, the instrument reads the color patch using the incandescent illuminant and then calculates an approximate correlated D50 value. Of course instruments that have the ability to measure color with a simulated D50 illuminant will provide a much more accurate D50 value (i.e., the M1 color measurement condition).
Densitometer filters are designed with different spectral characteristics:
• Status A & M are for photographic applications
• Status T is a wide band filter which is the standard in North America for the graphic arts
• Status E is widely used in Europe (typically yielding higher yellow values than status T)
• Status I is a narrow band filter set
It is very important that the status filter used be stated along with the measurement information since different filters can significantly affect measurement data.
Very best regards,
Sappi North America
QHow do I request printed samples of books in my library?
A You can order samples of any of the items in your library (that are still in print) at http://www.sappisamples.com. If you are new to our samples site, click on “Self Registration” to create a free account and then search for the items you’d like to order by clicking on “Place Order”.
QI'm new to Sappi. What rare historical documents can I access?
A Under the Browse button, you have the option of “Topics” or “Collections”. Choose “Collection” and then choose “Archive” (scroll down to the bottom of the dialog box). Here you will be able to find documents from the days of S.D. Warren and Potlatch – two companies that make up the legacy history of Sappi. You will find design, printing and reference materials that are no longer in print (for example, the @issue series that was put out by the Corporate Design Foundation and the Potlatch Design Series on Typography), and many of which we have only one copy left in our Sappi library. You will be able to download and read the complete text of these archived publications. We hope you enjoy them!
QWhat is 3D printing and is Sappi involved in the 3D printing business?
A Sappi is not involved in 3D printing - and interestingly enough, some people argue that the technology is not really printing…at least as we know it in the graphics industry.
3D printing is the process of using a short-run additive manufacturing process to create 3D objects. The printer drips out the substrate, usually plastic or liquid metal, and based on data provided by the 3D modeling software, manufactures the item. It is a slow process, taking from minutes to hours to days, creating one item at a time.
Although 3D printers are based on the concept of inkjet printing, it is more like manufacturing than printing. The process is being used to create everything from promotional items to machine parts to components for the space shuttle. It’s even being used to create prosthetics.
You can learn more about the process using the link below. If you would like a more in depth, technical look at 3D printing, they offer a research paper for sale as well.
QCan you recommend a good website for generating QR codes?
A While we don’t have a specific recommendation for a QR code generator, there are many free ones out there that all do the job and have the same basic functionality (a web search for “qr code generator” will turn up several.)
Here are a couple of free tools that you can check out to get you started:
QAre ICC profiles available for Sappi products? Where do I get them?
A Yes, ICC profiles are available for both Sappi sheetfed and certain digital products. If you would like to request the profiles or have any questions on how to use them, please e-mail Dennis Dautrich at Dennis.Dautrich@sappi.com, and he will send you the profiles and answer your questions.
QWhat does Chain of Custody mean? If my printer is certified, does that mean that the paper is certified?
A Chain of custody is a tracking mechanism that tracks the paper from the forest, the mill, the merchant and then the printer. All 'links' in the chain need to be certified. To get more information, go to sappi.com/eQ where we have posted an on product label guide that will help you understand what labels you can use , and when.
QWhat is the difference between a silk and a dull finish?
A A silk finish is a smooth, soft finished surface with moderate paper gloss. Coating pigments are oriented so that light scatter is controlled. Silk is best for printing subjects that have high tactile sense and require high resolution without high gloss. A dull finish is a soft non-gloss surface best for printing subjects that benefit from smooth, flat, solid ink lay and excellent readability.
QSappi has used some 'please recycle' logos that I haven't seen before. Where can I find these kind of logos and is artwork available for me to use?
A We recently created an online "please recycle" logo library as a resource and source of inspiration. And yes, these logos are available for you to use and the digital versions are available to download at sappi.com/eQ.