Highest Quality

Quality is a big word and it’s not one taken lightly at Densi.  Ask around the industry and people will tell you that Densi is known as a high quality company with high quality products. Getting to that point and staying there is the result of ongoing and significant investment and there are many parts to our quality story.

Dedicated Quality Team

Densi's Quality team works closely with Densi's major suppliers to insure strict adherence to technical standards, performing quality audits, and partnering with them to ensure that Densi has consistently superior products.

In-House Laboratory Testing

At our lab in Montreal, Canada, we are constantly testing new consumables for the newest machines on the market. Our testing methods, which are based on the standards and procedures laid down by ASTM International.

By way of example, toner is one of the most difficult items to test, and Densi toner testing takes into account what the machine needs are, based on the OEM specifications, as well as "real" world testing showing us yields, image density (ID), image quality (IQ), background (BG), offsetting, transfer efficiency (TE) and a number of other variables.  A Beckman Coulter Multisizer is used to analyze both the toner particle size and the distribution of particle size within a given sample.

We can and do test all inbound toners to verify that the production lots match the R&D sample/OEM tests from the beginning.

Inbound Inspection

Visual inspection and Coulter testing is done for all toners with samples based on the actual lot size received. Samples are taken for each lot received of the same type. At a minimum, machine testing is based on a two-hour run time for the toner. For example, if the machine is rated at 45 prints per minute, then 5,400 prints are done, 45 x 60 (minutes) x 2 (hours). The above mentioned test sampling from Product Development is used to check against retained samples and verify that the newly received lots match the specifications.

Third Party Validation

Densi products are tested at random by an internationally recognized third-party laboratory, Buyers Lab International. BLI is the only U.S.-based testing facility that tests OEM equipment for the OEM itself.

Quality Process - Checks and Balances

When the toner lot arrives at Densi’s loading dock, the Receiving staff verify that the quantity ordered has been received. The purchase order is then entered into our system, but listed as "Held for Inspection" until all the above testing is complete. At this point a "Ticket" for QA is automatically and electronically issued, and an email is sent to QA to notify them that a production sample is inbound for testing.

Once the testing is complete, and the test results have been obtained, the QA technician will complete their portion of the ticket, through Densi's portal site. An email is then sent to the QA manager to verity that the test results are acceptable. Once the manager accepts the results, the product is moved from "Inspection" to "On Hand". The relevant number of stock labels are printed at the receiving area and placed on each drum of toner.

 

ASTM Standards & Procedures used by Densi

F577-03 Standard Test Method for Particle Size Measurement of Dry Toners.
F1856-04 Standard Practice for Determining Toner Usage for Printer Cartridges.
F2036-05 Standard Test Method for Evaluation of Larger Area Density and Background on Electrophotographic Printers.
F2452-04 Standard Practice for Determining the Adhesion of Print Media Utilizing Mechanical Stress: Two Different Test Methods-Score/Tape and Cross Hatch.
F2632-07 Standard Practice for Determining the Toner Usage for Color Printer Cartridges.
F875-94 (2003) Standard Test Method for Evaluation of Large Area Density and Background on Office Copiers.
F995-97 (2006) Standard Practice for Estimating Toner Usage in Copiers Utilizing Dry Two-Component Developer.
F1206-94 (2005) Standard Test Method for Evaluating Color Image Output from Color Printers and Copiers.
F1424-92 (2006) Standard Test Method for Estimating Toner Usage in Full-Color Copiers Utilizing Dry Mono- or Dual-Component Toners.

 

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