Can You Make a Spongeless Refillable HP 305 Cartridge Like HP 61-68?

Question:
I watched your video about making a spongeless refillable HP cartridge for models 61, 62, 63, 64, 65, 66, 67, and 68. Thanks for sharing this! But can we do the same process with an HP 305 cartridge?

Answer:

Now, regarding your question: yes, you can apply the same spongeless refill method we demonstrated for HP 61-68 series cartridges to the HP 305 cartridge. The internal design is very similar, so the same refill kit and steps are compatible. The principle behind this method is removing or bypassing the sponge inside the cartridge and creating a controlled ink chamber that allows for consistent refilling. This reduces clogging risks, improves ink flow, and extends the usable life of the cartridge.

The key steps usually include:

• Opening the cartridge carefully to access the sponge.

• Removing or hollowing out the sponge to create an ink reservoir.

• Installing a sealing plug or port to allow for clean refilling.

• Using the refill kit to introduce ink without creating pressure imbalances.

As with all spongeless modifications, it's important to handle the cartridge delicately and ensure that air channels remain open. If air circulation is blocked, you might experience ink starvation or inconsistent printing. The HP 305 will respond well to this approach if done correctly.

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