---
title: "Solidified Fiber Board Drop Rates (CN server)"
description: "Solidified Fiber Board drop rates on the CN server: 13-5 5.50% (810,401 samples), 13-5 5.46% (400,276), 15-18 4.51% (45,896); 4 stages in total. Updated 2026-10-23. Crowdsourced Arknights drop data by Penguin Statistics."
lang: en
server: CN
item_id: "31074"
as_of: 2026-10-23T14:31:59Z
time_zone: UTC+8
rows: 4
rows_total: 4
canonical: "https://penguin-stats.io/en/result/cn/item/31074"
api: "https://penguin-stats.io/PenguinStats/api/v2/result/matrix?server=CN&itemFilter=31074&show_closed_zones=true"
license: CC BY-NC 4.0
license_url: https://creativecommons.org/licenses/by-nc/4.0/
attribution: "Data: Penguin Statistics (penguin-stats.io), CC BY-NC 4.0"
---

# Solidified Fiber Board Drop Rates (CN server)

Server: **CN server** · [US server](https://penguin-stats.io/en/result/us/item/31074.md) · [JP server](https://penguin-stats.io/en/result/jp/item/31074.md) · [KR server](https://penguin-stats.io/en/result/kr/item/31074.md)

Drops of Solidified Fiber Board by stage on the CN server, by percentage, highest first: 4 of 4 stages

| Stage | ID | Loots | Samples | Percentage | Sanity Required Per Item | Sanity | Time Range |
| --- | --- | ---: | ---: | ---: | ---: | ---: | --- |
| [13-5](https://penguin-stats.io/en/result/cn/stage/main_13_tough/tough_13-04.md) Episode 13 (Tough) | `tough_13-04` | 44572 | 810401 | 5.50% | 436.36 | 24 | 2023-10-08 until now |
| [13-5](https://penguin-stats.io/en/result/cn/stage/main_13/main_13-04.md) Episode 13 (Standard) | `main_13-04` | 21838 | 400276 | 5.46% | 439.88 | 24 | 2023-10-08 until now |
| [15-18](https://penguin-stats.io/en/result/cn/stage/main_15/main_15-16.md) Episode 15 | `main_15-16` | 2070 | 45896 | 4.51% | 465.63 | 21 | 2025-04-21 until now |
| [17-17](https://penguin-stats.io/en/result/cn/stage/main_17/main_17-16.md) 第十七章 | `main_17-16` | 1470 | 33128 | 4.44% | 473.29 | 21 | 2026-05-01 until now |

Samples: runs of the stage reported in the time range. Loots: total number of the item dropped in those runs. Percentage = Loots ÷ Samples, the expected number dropped per run, which can exceed 100%. Sanity Required Per Item = Sanity ÷ Percentage. Time Range: since the drop table of the stage last changed.

Updated 2026-10-23 22:31 (UTC+8). [Full data (JSON)](https://penguin-stats.io/PenguinStats/api/v2/result/matrix?server=CN&itemFilter=31074&show_closed_zones=true). License: [CC BY-NC 4.0](https://creativecommons.org/licenses/by-nc/4.0/)

## Related Items

- [Fuscous Fiber](https://penguin-stats.io/en/result/cn/item/31073.md) `31073`