Silver Conductive Pen
842AR-P Technical Data Sheet
842AR-Pen
Description
The 842AR-P
Silver Conductive Pen
easily draws and repair conductive traces. It dispenses a conductive
paint made of durable acrylic lacquer that is pigmented with extremely conductive silver flakes. The cured
traces are durable and corrosion resistant.
This pen works best on smooth, flat, hard surfaces. The valve-tip opens when pressed against the drawing
surface, and the flow is controlled by squeezing the barrel.
Applications & Usages
Use this pen for drawing or repairing extremely conductive traces.
It is used for repairing damaged traces on keyboards, game controllers, remote controls, mixing boards,
or PCB’s.
Also, it is used to create conductive traces on a variety of surfaces for prototyping, hobbies, or maker
projects. It is good for making small connections in or between circuits, such as jumpers, through-holes,
bridges, and links. It can also be used to increase the surface area of contacts by painting the area around
them.
Benefits and Features
Volume resistivity: 0.0001
cm
Creates durable, reliable, and highly conductive connections
Typical trace width: 0.9 mm
Dries in minutes at room temperature
ENVIRONMENT
RoHS Compliant
Low-VOC
Adheres to plastics, epoxy, copper, aluminum, ceramics, wood, and most electronic
substrates
Adheres to ABS, PLA, and other 3D printed plastics
Superior corrosion resistance
Mild solvent system
Toluene, xylene, and MEK free
A
TTENTION
!
Shake rigorously before use. For best results hold pen at angle, depress pen tip
against surface, and draw pen across surface while gently squeezing middle.
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Silver Conductive Pen
842AR-P Technical Data Sheet
842AR-Pen
Usage Parameters
Properties
Handling Time
Drying Time @25 °C [77 °F]
Drying Time @65 °C [149 °F]
Shelf Life
Typical Trace Width
Theoretical Pen
Coverage
a)
Value
10 min
24 h
30 min
2y
0.9 mm
≤450
cm
2
≤70
in
2
Temperature Ranges
Properties
Constant Service
Temperature
Intermittent Temperature
Limit
Storage Temperature
Limits
b)
Value
-40 to 120 °C
[-40 to 248 °F]
-50 to 125 °C
[-58 to 257 °F]
-5 to 40 °C
[23 to 104 °F]
a) Idealized estimate based on a coat thickness
of 25
m
[1.0 mil] and 100% transfer
efficiency
b) The product must stay within the storage
temperature limits stated.
Principal Components
Name
Silver
Acrylic Resin
Acetone
Dimethyl carbonate
Heptan-2-one
CAS Number
7440-22-4
25608-33-7
67-64-1
616-38-6
110-43-0
Properties of Cured 842AR-P
a)
Electric & Magnetic Properties
Volume Resistivity
Surface Resistance
a)
Surface Resistance :
1 coat
Surface Resistance :
2 coats
Surface Resistance :
3 coats
Magnetic Class
Relative Permeability
Physical Properties
Paint Type
Color
Abrasion Resistant
Blister Resistant
Peeling Resistant
Water Resistant
Method
Method 5011.5
in MIL-STD-883H
Square probe
Square probe
Square probe
Value
0.0001
cm
9337 S/cm
Resistance
Conductance
b)
<0.01
sq
>100 S
<0.01
sq
b)
>100 S
b)
<0.01
sq
>100 S
Diamagnetic (Non-magnetic)
<1.0
Value
Lacquer (Thermoplastic)
Metallic Silver Grey
Yes
Yes
Yes
Yes
Method
—
Visual
—
—
—
—
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Silver Conductive Pen
842AR-P Technical Data Sheet
842AR-Pen
Mechanical Properties
Adhesion
c)
Pencil Hardness
c)
Method
ASTM D3359
ASTM D3363
Value
5B
3H, hard
a) Values based on liquid format. Pen format values may vary slightly.
b) Readings less than 0.01
/sq
are below the detection limit of the handheld multimeter and square
probe method.
c) Tested using HVLP spray gun application on acrylonitrile butadiene styrene (ABS) coupons
Properties of Uncured 842AR-P
Physical Property
Color
Density @25 °C [77 °F]
Solids Percentage (wt/wt)
Viscosity @25 °C [77 °F]
a)
Flash Point
Odor
a) Brookfield viscometer at 30 RPM with spindle LV S62
Mixture
Metallic Silver
1.7 g/mL
61%
873 cP [503 mm
2
/s]
-17 °C [1.4 °F]
Acetone-like
Compatibility
Chemical—The
silver filler is quite resistant to oxidation, except in environments that contain
contaminants like H
2
S or ozone which tarnish its surface. Unlike many other metal oxides, silver oxide
remains conductive so degradation due to oxidation is not as bad.
The thermoplastic resin is dissolved by common paint solvents like toluene, xylene, acetone, and MEK.
This allows great coating repair and work characteristics, but it does make the coating unsuitable for
solvent rich environments.
Adhesion—The
842AR-P coating adheres to most plastics used to house printed circuit assemblies;
however, it is not compatible with contaminants like water, oil, and greasy flux residues that may affect
adhesion. If contamination is present, clean the surface to be coated first.
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Silver Conductive Pen
842AR-P Technical Data Sheet
842AR-Pen
842AR-P Adherence Compatibility
Substrate
Acrylonitrile Butadiene Styrene (ABS)
Polybutlylene Terephtalate (PBT)
Polycarbonate
Polyvinyl Acetate (PVA)
Polyvinyl Chloride (PVC)
Acrylics or Acrylic Paints
Copper, Lead, Tin
Epoxy, FR4 substrate
Polyurethane
Wood
Note
Chemically etches
a)
and adheres well to this substrate.
"
"
"
"
Adheres well to clean surface
"
"
Adheres well to clean surface for most urethane types
Adheres well with surface preparation
a) Etching is similar to sanding, except that it also softens the surface helping to meld the paint to the
plastic for superior adhesion.
A
TTENTION
!
Do not use on thin plastics or on plastics where you want to keep original surface intact.
The 842AR-P contains a controlled amount of solvents designed to chemically etch plastic surfaces to help
adhesion by melding the acrylic coating into the plastic substrate. This prevents flaking or peeling. Using
the 4351-1L thinner lessens the etching effects for chemically sensitive substrates.
Storage
Store between -5 and 40 °C [23 and 104 °F] in dry area. Store pen with the tip up after use.
Health, Safety, and Environmental Awareness
Please see the 842AR-P
Safety Data Sheet
(SDS) for greater details on transportation, storage, handling
and other security guidelines.
Environmental Impact:
The VOC (Volatile Organic Compound) content is 12% (200 g/L) by EPA and
WHMIS standards.
This product meets the European Directive
2011/65/EU Annex II (ROHS);
recasting 2002/95/EC.
Health and Safety:
The solvents in 842AR-P can ignite if exposed to flames or sparks and can cause
respiratory track irritation. If ignited, then flame flash back is possible. Use in well-ventilated area.
Solvents can cause skin irritation and have some reproductive effects. Wear safety glasses or goggles and
disposable gloves to avoid exposures.
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Silver Conductive Pen
842AR-P Technical Data Sheet
842AR-Pen
HMIS® RATING
HEALTH:
FLAMMABILITY:
PHYSICAL HAZARD:
PERSONAL PROTECTION:
Approximate HMIS and NFPA Risk Ratings Legend:
0 (Low or none); 1 (Slight); 2 (Moderate); 3 (Serious); 4 (Severe)
NFPA® 704 CODES
* 2
3
0
3
2
0
Pen Application Instructions
Follow the procedure below for best results.
To apply the liquid pen
1.
2.
3.
4.
5.
6.
7.
Ensure that the surface to be coated is clean and oil-free.
Shake pen vigorously until the ball moves freely inside
Hold pen at angle and depress tip against surface
Draw pen across surface while gently squeezing barrel
Let dry 10 minutes before handling
For optimal conductivity, let stand 24 hours or heat cure at 65 °C for 30 minutes
Replace cap and store tip up after use
To cure at Room temperature
Let air dry 24 hours
To accelerate cure by heat
After flash off, put in oven or under heat lamp at 65 °C for 30 min.
N
OTE
:
Coats that are very thick require more time to dry.
A
TTENTION
!
If heat curing, do not exceed 65 °C as this may cause surface defects due to
solvents evaporating off too quickly.
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