Humidity Indicator Cards (HIC) for PCB Dry Packing

Description

ONESTEP PACKING manufacturers a full line of Humidity Indicating Cards (HIC) which allows a low-cost method of indicating humidity conditions
for various types of barrier packaging, including MIL Spec (MIL-I-8835)
Applications. The 30%, 40%, 50% HIC card complies with MS 20003-2
And the 5%, 10%, 15% comply with JEDEC Standard 033.
The 5%, 10%, 60% card complies with JEDEC Standard

Quantity per can:

5%-10%-15%  -    125 cards/can , 250 cards/can
10%-20%-30% - 125 cards/can, 250 cards/can
30%-40%-50% - 125 cards/can, 250 cards/can
5%-10%-60%  -   125 cards/can, 250 cards/can
10% - 60%       -   200 cards/can, 250 cards/can
8% single spot -  500 cards/can

Humidity indicator cards are impregnated with a solution of cobalt chloride that has been carefully mixed to change color from blue through various shades of magenta-red, to pink. These cards are not precision indicators. However, they are very good at telling you the maximum possible humidity in a container. For example, if all of the dots are deep blue on a card which is a 10%- 60% card then you can be assured that the humidity in that container is below 10%. This is very important for some products and household items because as long as the humidity is below 40%, basic corrosion (rust) will not occur. Neither will mildew or mold in clothing or paper products. Finally, all sophisticated electronics: video cameras, computers, SLR cameras, sophisticated instruments, etc. enjoy a much longer and more reliable life if they are maintained at a very low relative humidity. For example, at the bottom of this page are cards that were developed specifically for the electronics (computer chips) industry. These companies require that the humidity in their shipping packages be below 10% and as of the guidelines established in the fall of 1999 are striving to maintain humidity below 5%.

You can compare the color change in this picture

The HIC card on the top is outside the bag and shows the humidity is more than 50%. The card sealed in the clear bag along with small packets shows the humidity inside the bag is lower than 10% (all spots are blue).
This card is reading that the humidity is certainly above 10%, probably around 20%
This card is reading that the humidity is somewhere around 50%

Humidity Indicator Cards:

The HIC should comply with MIL-I-8835 and, at a minimum, have three color dots with sensitivity values of 30% RH, 40% RH, and 50% RH.

PCB Dry Packaging:

Proper packaging of the lead-free compatible PCB is critical. The packaging system must be carefully developed by the PCB fabricator to protect the PCB from atmospheric moisture that may enter the packaging materials by diffusion. The packaging system should be developed to offer a shelf life of 12 months at ≤40°C and 90% RH.