Total Cost of Ownership of HP Hardware vs. Other Inkjet Technologies

Courtesy of HP, "Counting Costs" Brochure

3.  Other Myths about Thermal Inkjet Printing:

As a continually evolving technology, thermal inkjet (TIJ) technology has been the subject of many myths, which may be understandable. After all, traditional methods of printing simply cannot compete with the speed, accuracy, versatility, and short run cost-effectiveness of digital printing technologies. As a pioneer and an industry leader, HP and General Technology Company are in a unique position to dispel many myths about TIJ technology.

Common myths about thermal inkjet (TIJ) technology

» TIJ boils the ink.

» Thermal inkjet heads don't last.

» Only TIJ needs special ink.

» The choice you make between TIJ or piezo will determine all aspects of your system viability.


Myth: TIJ boils the ink.

Reality: Less than 0.3% of the ink is heated, and full print speed results in a 30°C temperature rise.


Myth: Thermal inkjet heads don't last.

Reality: The tradeoff is cost vs. life expectancy, and we have decided to use low-cost replaceable heads. The benefits of this trade-off to you include:

• Maintenance-free

• Higher reliability = higher uptime

• Efficient high-volume production

• Lower drive costs as a result of integrated drive heads and low drive energy requirements

• Consistent image quality—the last image out of the cartridge will equal the superb quality of the first image produced


Myth: Only TIJ needs special ink.

Reality: All inkjet technology requires special ink. Why?

The ink must be compatible with the printhead material, and there is a wide choice of thermal inkjet dye and pigment-based inks available. Thermal inkjet ink must be a low boiling-point fluid. A wide variety of fluids have been used successfully in the industry.

HP is proud to be the first to market water-resistant black dye inks; bright color inks that perform well on all papers; pigmented black inks that deliver superior opaque depth, sharp quality and waterfastness; and photo inks that have archival properties suitable for protecting the most precious and important memories.


Myth: The choice you make between TIJ or piezo will determine all aspects of your system viability.

Reality: In fact, it's a balancing act; sometimes a trade-off. You must determine which offers the most for your product implementation. HP believes that the most important benefits of TIJ are the value and uniform performance delivered by the complete printing system. These strengths include:

• Image quality and text quality

• Ease of use

• Ease of connectivity

• Initial cost of purchase

• Total acquisition cost

TIJ enables higher performance by excelling at each point in the printing system. A comparison of the system implications between TIJ and piezo underscores the HP inkjet reliability advantage:

• TIJ drop ejection integrity is not sensitive to small bubbles in the firing chamber, while piezo mechanical stability is extremely sensitive to small air bubbles, similar to a brake system in an automobile.

• TIJ has a natural release mechanism and a controlled flushing action, while piezo relies on wasteful flushing of the system with ink to purge trapped air.


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