Silver-containing conductive preparations of DODUCO GmbH

Manufacturer and supplier of silver-containing (silver-pigmented) conductive preparations (glues, varnishes, pastes)


Decades of experience in the area of production of silver-pigmented conductive preparations and close cooperation with the customer have enabled DODUCO to develop general and special problem solutions according to the customer's wish. This way, different conductive products resulted, the properties of which have been adjusted to different requirements.


DODUCO's range of precious-metal-containing (silver-pigmented) conductive preparations includes:



The products are available exclusively in 1kg bottles.



Silver conductive varnishes

DODUCO's silver-pigmented conductive varnishes are liquid, solvent-containing, physically drying varnishes. Depending on the area of application (carrier material, drying requirements), there are mostly two types distinguished:

  • Conductive varnishes on acrylate-resin basis and
  • Conductive varnishes on nitrocellulose basis

At a silver share of approx. 40 % silver (exceptions are possible) in the form of silver powder or silver flakes from own production, DODUCO's silver conductive varnishes are characterised by high electrical conductivities at low viscosities. The liquid conductive varnishes can be applied to the carrier materials by brush, roller or submersion. If a spray application is desired, the conductive varnish should be mixed with the corresponding diluent (information on the diluent is available on request). Drying takes place by evaporation of the solvents contained in the temperature range between 20-100°C (on demand, higher temperatures are possible as well).


DODUCO's product range currently contains the following conductive varnishes:



Base Acrylate resin
silver-content 40 %
Viscosity 40-50 mPas
Surface resistance 400 mOhm/cm² at RT   < 100 mOhm/cm² at 100°C
Properties/use hard, well-conductive silver layer


Base Nitrocellulose
silver-content 45 %
Viscosity 30-50 mPas
Surface resistance

< 200 mOhm/cm² at RT

< 50 mOhm/cm² at 100°C

Properties/use Level surface, particularly suitable for galvanic reinforcement


Base Nitrocellulose
silver-content 45 %
Viscosity 50-70 mPas
Surface resistance

< 200 mOhm/cm² at RT

< 50 mOhm/cm² at 100°C

Properties/use Hard, well-conductive silver layer, suitable for galvanic reinforcement



The benefit of the silver conductive varnishes as compared to the pastes is in simple processing and quick drying. Furthermore, they have a strong, good adhesion to the base and very good electrical and thermal conductivity.


DODUCO's silver-pigmented conductive varnishes are used in:

  • shielding of electromagnetic waves in the area of electrical engineering and electronics
  • Production of a contact in the area of electrical engineering and/or hobby electronics (e.g. electronic toys)
  • Repair of conductor tracks / improvement of printed circuits
  • Repair of heating conductors (rear window heatings)
  • Repair of antennas
  • Metallisation of non-conductive bases for galvanic further processing


Silver conductive paste

The also physically drying silver-pigmented conductive paste of DODUCO have a much higher viscosity than the conductive varnishes. This is caused by higher shares of silver (approx. 60%) and use of polymer basic components for formation of polymer compounds / design of the polymer structure. The silver used in the silver conductive paste in the form of silver powder or silver flakes is also from the DODUCO-internal production.


The silver-pigmented polymer thick-film paste are characterised by good electrical and thermal conductivity as well as good adhesion and bending resistance while being highly flexible. The application of conductive paste preferably takes place by screen printing, with selection of the mesh size varying depending on printing pattern, layer thickness and base. Drying and curing may take place in circulation air dryers, IR-dryers or special tunnel furnaces.

On remand, the silver-pigmented conductive paste can also be adjusted to different processing techniques (e.g. pad printing). The chemicals required for this may be purchased from DODUCO on request.


Base Acrylate resin
silver-content 63 %
Viscosity 1,5-3,0 Pas
Surface resistance < 50 mOhm/cm² at 150°C

Mechanically high-strength coatings with very good conductivity,

Good adhesion on plastic



The benefit of silver conductive paste as compared to the varnishes is in the better adhesion to plastic bases as well as films. I spite of high demands by increased flexibility, the layers remain stable and retain their very good conductivity.



DODUCO's silver-pigmented conductive paste are used in:

  • production of conductor tracks on membrane keyboards
  • production of circuits on PCBs



Contact person


Fabian Gall

Sales precious metal preparations
+49 7231 602 586





Tatjana Harting

Technical customer consulting
+49 7231 602 538





Product pages






DODUCO Contacts and Refining GmbH is an accredited Silver LBMA Good Delivery List Refiner. This logo is a trade mark of The London Bullion Market Association.





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