Nakagawa ensure:

All papers offered in the Nakagawa range are

  • approved and tested regularly on all these quality criteria´s.
  • are tested and approved by Thermoprinter and -Headmanufactures

This will give you the best possible usage in time and maintenance for your Thermoprinter.

Nakagawa guarantees

  • POS-Papers have minimum 5 years archivability
  • POS-Papers are matched to the printer manufacturer recommendations
  • POS-Papers are certified with the evironmental label
  • POS-Papers can should be recycled
  • POS-Papers have ISEGA-approval
  • NEP 51 and NEP 52 have 25 years archivability and high resistance.

Basic Technology Thermopapers

Thermo-direct-print for variable Data

The direct thermal printing in recent years, a high level of user latitude in many areas where varible data should be placed on paper, found, for the simple and reliable operation and the "low-cost of ownership".

Construction of the thermal paper

Aufbau Top-Coated


In the reaction colorformers, coreactors, meltingpoint regulators and the heat cause the imagebuilding.

Basic rule:
The faster the printer the higher the potential energy absobing in the coating hast to be , so that even with short term heat influence the full black image is developed

Benefits and weaknesses of direct thermal printing


Features



Reliability


Handling


Consumables


Maintenance Costs


Speed


Color


Resolution


Size of Printer


Archieveability


Extreme Conditions*


Printing Length / Flexibility


Noise


Direct-Thermo



XX


XX


XX


XX


X


o


X


XX


o



XX



XX


XX


Thermal-Transfer



X


o


o


XX


X


XX


X


X


XX



XX



XX


XX


Laser



X


o


o


o


XX


X


X


o


XX



o



o


X


Ink-Jet



X


o


o


X


o


XX


XX


X


X



o



o


X


DOT-Matrix-Printer



X


o


o


X


o


o


o


X


X



o



X


o

o = not tested parameters

Dynamic Sensivity Classification I

Presently in the market the used and offered qualities are defined as:

  • Low sensitive
  • High sensitive
  • Very High sensitive
  • Ultrau High sensitive


The measure of these characteristics is the dynamic sensitivity.

In order to get the Dynamic Sensiitviitiy represented we have to face:

Dynamic Sensivity Classification II

Dynamic Sensitivity Classification III

Dynamic Sensitivity Classification III


 

The archiving of thermal paper

Apart from visibility factors, the archivability of a thermal paper is linked to the dynamic sensitivity. The archivability of paper is always directly connected to a fully developed black.

The given archivability values is always linked to standard paper archiving specifications which are definded as +/- 20°C, 50% rel. humidity and standard filing .

In Europe papers from 2-25 years archivability are offered.

Resistance of thermal paper I

Environmental influences = reduction of archivability = Image fading in time

Among these factors:

  • UV-Light
  • Moisture
  • Fat
  • Plasticizers *

* Plasticizers are usually inall soft-PVC´s. PE-folders and hard PVC-folders do not contain softeners so they can be used. Sometimes even wallets and purses contain plasticiziers (to make the leather feel softer).

Resistance of thermal paper

* Plasticizers are usually in all soft-PVC´s. PE-folders and hard PVC-folders do not contain softeners so they can be used. Sometimes even wallets and purses contain plasticiziers (to make the leather feel softer).

The lower the `starting´ archivability of a product, the faster the prescribed influences will take place. The ability of a thermal paper to withstand external influences we prescribe as resistance.

There is a direct link between the cost of a product and its resitance, because more resistant color formers are also more expensive.

 

Classificateion of resistance

The ability of thermal paper is called resistance and is classified as follows:

Classificateion of resistance


Static Sensivity

Thermal paper classification

=

Static Sensivity


  • Is a printer linked issue. It is more a question of the actual usage.
  • Shows the value at which temperature the paper starts to develop the image.
Presently the most common standard papers start to develop at 70°C. 
Papers which have a starting temperature of 90°C or 120°C are available on special requests.

Static Sensivity II

Static Sensivity


Life expetancy of thermal printer heads

Worth knowing about thermal printer heads

Thermo heads are basically the resistors that are covered by a protective film. Today standard heads produce around 200 dpi, although heads producing 300 dpi are also in use.

Preliminary experiments have already been carried out with photographic quality resolution.

Life expetancy of thermal printer heads II

Influenced by different factors:


Influence



high energy setting


dust from the surrounding


dust from the paper coating


edge dust



too rough surface and too high ion content of the paper coating


not heat resistant enough


pre-print links not heat resistant enough




Result



shorter lifetime

the dust may cause scratches on the thermal head


hard backed residue on the thermal


strong residue or even scratches on the thermal head on the roll edges


abrasion of the thermal head



abrasion of the thermal head


residue on the thermo head which prevents the heat from transfering onto the paper and leads to dot fall out (Attention: esp. Fluorescent colors are very problematic)


Solution



use higher sensitive paper


move the printer to another area


change paper supplier


change supplier



change supplier



change supplier


change supplier



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Technical information

In the technical part you will find some basic information on Thermopapers, Ink-Jet-, and laserprinting bases, as well as selfadhesive Labels.

Technical informations