Description
Reviews
| Brand | - |
| Category | Stationery, Educational Electronics & Office Supplies / Technical Pens |
| Origin | - |
| Tip Sizes | 0.3mm and 0.5mm dual tips |
| Ink Color | Black |
| Line Type | Double-line / Parallel line generator |
| Usage Scenario | Architectural drafting, engineering drawings, exam preparation |
| Material | High-quality plastic barrel with metal tip housing |
| Ink Type | Water-based pigment ink, quick-drying |
| Compatibility | Suitable for standard drafting paper and tracing paper |
| Package Contents | 1 x Double-Line Technical Pen |
| Special Feature | Fixed 1.5mm spacing between parallel lines |
| Target Audience | Registered Architects, Constructor Exam Candidates, Engineering Students |
Anonymous
Mar 31, 2026
Rating: 5/5
Essential for manual drafting classes
My professor recommended this brand. The parallel lines are perfectly spaced, which makes creating wall sections incredibly fast. Highly recommend for any student in architecture school.
Anonymous
Mar 14, 2026
Rating: 5/5
Sturdy and Reliable
As a level 1 constructor, I need tools that work every time. This pen has a nice weight to it and the ink flow is smooth. No skipping or blotching on my technical diagrams.
Anonymous
Mar 12, 2026
Rating: 5/5
Best investment for my toolkit
I was skeptical about dual-tip pens, but this one is precise. The 0.1 level precision mentioned in the description holds up well for detailed column work. Will buy again.
Anonymous
Mar 02, 2026
Rating: 5/5
Perfect for the Architect Exam
I bought this specifically for the Registered Architect exam preparation. The double-line feature saves so much time when drawing walls compared to using a ruler twice. The 0.3mm and 0.5mm tips are very consistent.
Anonymous
Mar 02, 2026
Rating: 4/5
Great tool, takes practice
The concept is brilliant for engineering drawings. It took me a few sheets of paper to get the angle right so the lines don't smear, but once I got the hang of it, my drafts look professional.
Anonymous
Mar 01, 2026
Rating: 3/5
Good but cap is tight
The pen itself writes beautifully and the double line function works as advertised. However, the cap is extremely tight and sometimes hard to remove quickly during an exam. Otherwise, good quality.
Q: What is the exact distance between the two lines generated by this pen?
A: The fixed spacing between the parallel lines is approximately 1.5mm, which is standard for most architectural wall representations.
Q: Is this pen suitable for left-handed users?
A: Yes, the pen works for both left and right-handed users. However, left-handed users should allow a brief moment for the ink to dry before moving their hand across the fresh lines to prevent smearing.
Q: Does this work well on tracing paper without bleeding through?
A: Yes, the fine 0.3mm and 0.5mm tips are optimized for drafting paper and tracing paper. The ink dries quickly to minimize bleed-through on standard weights.
Q: Can this pen be refilled with standard technical pen ink?
A: No, the Jinwannian Double-Line Pen is designed as a disposable unit. Once the ink is depleted, the entire pen should be replaced to ensure line consistency.
Q: Is the ink waterproof once it dries?
A: The ink is water-based and quick-drying. While it resists smudging after drying, we do not recommend submerging the paper in water as it is not fully waterproof like solvent-based inks.
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