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Low-Resistance Carbon Screen Printing Ink

Ideal for screen printing membrane switches and flexible circuits


Product Information | Process Recommendation | MSDS | Related Products | Technical Support


A carbon-graphite conductive ink engineered for screen printing applications. The low-resistance paste makes it ideal for printing membrane switches and flexible electronics. This carbon ink delivers superior mechanical durability for excellent resistance against wear from surface-mounting technology components and hybrid circuits, alongside exceptional adhesion (5B, ASTM D3359) to pre-treated PET and common rigid PCB substrates.

Screen printing materials

Conductive Carbon Ink

Strong adhesion ideal for
screen-printed thin films

Versatile use for screen printing, spray coating and dip coating

Versatile Applications

Flexible printed circuits
and membrane switches

High quality silver ink

High Quality Formulation

For reliable and impactful
electronics research

High Conductivity silver ink

Low Resistance Material

Tailored conductivity with
mechanical durability

Product Information


Product Name Heraeus Electronics, PriElex™ C-250J
CAS Number 1333-86-4/7782-42-5
Chemical Formula C
Other Names Carbon conductive ink, conductive carbon ink, carbon screen printing ink, carbon paste
Classification or Family Screen printing, Flexible electronics, Carbon, Conductive inks
Solid Content 50 ± 2%
Solvent Diethylene glycol monoethyl ether acetate (DEGMEA), naphtha
Particle Size < 25 µm (D95)
Resistivity ≤ 0.022 Ω⋅m
Viscosity 23.5 – 36.5 kcPs (Vt-04, No.2 spindle, 25 °C)
Theoretical Coverage 160 m2/kg (14 µm thickness)
Appearance Black ink/paste

Carbon Conductive Ink Gallery


Process Recommendation


Use Mix thoroughly before use
Type of Screen Polyester Mesh (157 to 230 TPI) or steel Mesh (165 to 325 TPI)
Recommended Substrates Print-treated PET, rigid PCB substrates
Drying Temperature 100 – 130 °C
Cleaning Suitable screen cleaner with a final pass of acetone/MEK to clean up any residual solvents/film

MSDS Documentation


C-250J Carbon PasteC-250J Carbon Ink MSDS Sheet


Technical Support


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