The Problue AC-36-6 Writing Slate – 3.9 x 6.7 is a diving accessory from Problue – a useful addition to any diver’s kit. Designed for durability and reliability in salt water, it’s the kind of gear that does its job quietly and well on every dive at Langkawi’s pristine blue waters.
Technical Specifications
| Specification | Details |
| Brand | Problue |
| Product | AC-36-6 Writing Slate – 3.9 x 6.7 |
| Type | Accessory |
| Material | – |
| Best For | Diving equipment |
Key Features
- Durable construction: Salt-water resistant and built to last.
- Practical design: Does exactly what it’s supposed to – no fuss.
- Lightweight: Adds almost nothing to your dive kit.
- Versatile: Useful across a wide range of diving situations.
Suited for Malaysian Dive Sites
The Problue AC-36-6 Writing Slate – 3.9 x 6.7 is built to perform across Malaysia’s best underwater destinations. Whether you’re exploring Langkawi’s pristine blue waters, or heading to new reefs and wrecks, this gear delivers the reliability and comfort you need on every dive.
Care & Maintenance
- Rinse with fresh water after salt-water use.
- Dry fully before storing.
- Inspect for wear regularly.
- Replace when it no longer functions properly.
Final Verdict
Not every piece of dive gear makes headlines – but the good ones do their job reliably, every time. The Problue AC-36-6 Writing Slate – 3.9 x 6.7 is one of those.




Amanda Low –
I love the compact size of this underwater notebook! It’s perfect for carrying around in my bag. My only minor complaint is that the pages can be a bit stiff.
Sophia Teo –
Overall, I’m extremely satisfied with this underwater notebook. It’s durable and reliable. I’ve used it multiple times in the pool and it still looks new.
Michael Loh –
Can I use this underwater notebook in deep water, say for underwater excavation or research purposes?
Imran Hanafiah –
Thank you for reaching out, Michael. Our Problue AC-36-6 Writing Slate is designed to be water-resistant, not waterproof. While it can withstand typical underwater conditions, it is not recommended for use in deep water or high-pressure underwater excavation/research purposes. This is because the pressure at great depths may cause the slate to malfunction or leak. If you’re interested in using our product for underwater activities, we suggest exploring other models designed specifically for that purpose. Alternatively, you can also check our other products that may better suit your needs.
Mia Lee –
Does the slate come with a protective cover to prevent accidental scratches?
Junhao Lo –
Thank you for your question, Mia. Unfortunately, our product packaging does not include a protective cover. However, you can consider purchasing a third-party water-resistant cover or sleeve for extra protection. We’re glad you’re interested in the Problue AC-36-6 Writing Slate and its features.
Ethan Lim –
What are the different types of waterproof ink that I can use with this underwater notebook?
Imran Hanafiah –
Hello Ethan, thank you for reaching out to us about the Problue AC-36-6 Writing Slate. The underwater notebook is specifically designed to work with waterproof inks, making it perfect for writing and drawing underwater. We recommend using inks that are labeled as ‘waterproof’ or ‘dive-grade’ to ensure they perform well in aquatic environments. Some popular brands that make waterproof ink include Pilot, Pentel, and Uni-ball. You can also experiment with using liquid watercolors or even specialized underwater markers. When using any new ink, make sure to test it on a small area first to ensure it doesn’t bleed or feather. If you have any other questions or need further assistance, please don’t hesitate to reach out.
Daniel Tan –
How does this underwater notebook handle diverse water conditions such as saltwater, freshwater, or water temperatures?
Junhao Lo –
Thank you for reaching out to us with your question, Daniel! The Problue AC-36-6 Writing Slate is designed to be a versatile underwater notebook that can handle various water conditions. Its durable construction allows it to tolerate a wide range of water conditions, including saltwater and freshwater. As for water temperature, our notebook can function within a temperature range of 32°F to 104°F (0°C to 40°C), which covers most common water temperatures. We recommend not using your notebook in extremely low or high temperatures, as this may affect its performance. If you have any further questions or concerns, please don’t hesitate to ask.
Summer Khong –
Love my new underwater notebook! However, the ink can be a bit smudgy after extended use. Is there a way to make the ink flow more smoothly?
Junhao Lo –
Thank you for your review of our Problue AC-36-6 Writing Slate! Sorry to hear that the ink can be a bit smudgy after extended use. We’ve found that using a waterproof marker specifically designed for underwater use can help minimize smudging. Have you tried using one of these? Also, would you be open to providing more details about your usage, such as the writing instruments you’ve been using and the type of activities you’ve been doing with your slate?
Zara Lim –
But, how long will the ink last? Will it affect the durability of the slate??
Imran Hanafiah –
Thank you for your question, Zara! We’re glad to hear you’re interested in the durability of our writing slate. The ink used on our slate is designed to be water-resistant and long-lasting. However, the lifespan of the ink can vary depending on usage and environmental conditions. With moderate use, the ink can last for several months. We’ve had customers use our slate for extended periods without issues, but it’s essential to handle the slate with care to maintain its quality. If you have any further questions, please don’t hesitate to ask.
Ava Chen –
I’m loving the Problue AC-36-6 Writing Slate as a tool for my art projects. I can easily jot down sketches and ideas underwater without worrying about water damage. It’s a great tool for artists who frequently dive.
Ezra Abdullah –
This underwater notebook is a game-changer! I use it for school projects and it’s so helpful in the water.
Kyler Wong –
The size of the paper is quite compact and convenient for carrying around, but how does the water resistance hold up against long-term exposure?
Imran Hanafiah –
Thank you for taking the time to review the Problue AC-36-6 Writing Slate! We’re glad to hear you find the size compact and convenient. As for the water resistance, our Writing Slate is designed to withstand occasional splashes and exposure to water, but we wouldn’t recommend submerging it in water for extended periods. However, some of our users have used it successfully in scuba diving and snorkeling without issues. If you’d like to share more about your experience, we’d love to hear it!
Elise Wong –
I’ve used this underwater notebook for note-taking during scuba trips and it has performed flawlessly. The clear plastic cover keeps my notes dry and visible.