Previously, in [Identification of Six Types of Fakes](chenxiang-jiahuo-liulei-jianding), we listed oil soaking and oil injection as the top 'disaster areas' of counterfeiting. This article expands on it separately: how oil soaking and oil injection are actually done, why they can fool beginners, and how to see through them at a glance.
Previously, in [Identification of Six Types of Fakes](chenxiang-jiahuo-liulei-jianding), we listed oil soaking and oil injection as the top 'disaster areas' of counterfeiting. This article expands on it separately: **how oil soaking and oil injection are actually done, why they can fool beginners, and how to see through them at a glance**.
Many beginners have an obsession when buying agarwood—'the more oil, the better; the blacker, the more valuable.' Counterfeiters precisely exploit this psychology, using chemical or physical means to 'feed' cheap wood into 'full-oil black material.' After reading this, you can at least avoid most 'full-oil traps.'
**Oil soaking**: Soaking low-oil or oil-free wood (often Aquilaria sinensis sapwood, or even other tree species) in **agarwood essential oil, fragrance, or chemical oils**, allowing the oil to penetrate the pores, making the surface look 'rich and plump with oil.'
**Oil injection**: More 'hardcore' than oil soaking—through **pressure, injection**, and other methods, oil/fragrance is forced into the interior of the wood, making the entire piece 'oily' from inside out, and even sinking.
The purpose of both is the same: **to disguise low-cost material as natural agarwood with high oil content and high value**.
> Key point: Natural resin formation is the result of a tree's **self-secretion and aging over years** after injury; the oil and wood coexist, with uneven distribution. Oil soaking and injection are 'external oil infusion'; the oil floats in the pores or is uniformly rigid—this is the fundamental dividing line for identification.水岭。
1. **Strong visual impact**: After oil infusion, the material is jet-black and shiny, fitting the stereotype that 'full oil = good'; 2. **Can fake sinking**: Oil injection under pressure can greatly increase density, hence fake sinking; 3. **Has fragrance**: Soaked in agarwood essential oil/fragrance, it smells 'like agarwood too'; 4. **Cheap and abundant**: Low cost, merchants can sell at low prices in volume, and buyers think they've 'scored a bargain.'
> Reminder: Real agarwood's oil lines and oil content are **natural, uneven, and layered**; oil-soaked/injected material is often 'unnaturally perfect.' Recognizing fragrance, oil lines, and testing is more important than recognizing 'full oil' (refer to the component approach in [Pharmacopoeia standards](2025-yaodian-chenxiang-jiedu)).路）。
| Dimension | Natural Resin | Oil Soaking/Injection | |---|---|---| | Oil lines | Natural, uneven, with transitions | Blurred together or uniformly rigid | | Color | Natural transitions from dark to light | Uniformly jet-black, no layers | | Fragrance | Three-layered, cool-sweet/medicinal-cool | Monotonous, pungent, artificial | | Weight | Sinking depends on true density | Can be artificially weighted by oil injection | | Pores | Natural | Clogged by oil, no breathability |
1. **Check if oil lines are 'alive'**: Natural oil lines are like the tree's 'blood vessels,' with direction and depth; oil-soaked material has blurred, indistinct oil lines. 2. **Check color transitions**: Natural material has natural color differences, transitioning from light to dark; dyed/oil-soaked material is uniform throughout. 3. **Smell the fragrance layers**: When heated or smelled for a long time, natural agarwood has three-stage changes; oil-soaked material often smells pungent immediately and becomes dull or artificial over time. 4. **Feel the texture and temperature**: Natural agarwood is warm and smooth, not sticky; heavily oil-soaked material often has a **sticky surface with oiliness**, feeling greasy. 5. **Undergo authoritative testing**: Testing based on the component categories in the [2025 Pharmacopoeia agarwood section](2025-yaodian-chenxiang-jiedu) (such as characteristic chromatograms, agarotetrol) is the hardest bottom line.
Oil soaking and injection are often combined with the **line drawing (artificial oil lines), splicing (good material veneer), compression (density enhancement), and tech-sinking (accelerated artificial resin formation)** from the [six types of fakes](chenxiang-jiahuo-liulei-jianding), forming an 'all-around fake.' To avoid pitfalls, look comprehensively, not just at one point.
**Q1: Is oil-soaked agarwood harmful?** Some chemical oils/fragrances may irritate the skin or respiratory tract and have no collectible value at all—stay away from them.
**Q2: Can oil-soaked pieces be washed back into genuine agarwood?** No. The oil has already penetrated the pores, and it was cheap wood to begin with, so it cannot be "restored."
**Q3: Are cheap "agarwood bracelets" all oil-soaked?** Not necessarily all, but low-priced fully oil-saturated dark material carries extremely high risk; natural agarwood of ordinary material (such as [Papua](babuya-chenxiang-quanjie)) also has genuine pieces that don't sink—the key is whether the oil lines are lively and whether the fragrance is true.
**Q4: Can testing always detect oil-soaking?** Authoritative component testing (characteristic chromatograms, agarotetrol, etc.) can distinguish natural from artificial/foreign oils, and is the most reliable safeguard.
> Data source: Identification principles are compiled from general industry knowledge and the component standards of the [2025 edition Pharmacopoeia agarwood section](2025-yaodian-chenxiang-jiedu); this article is for popular science and pitfall avoidance, and does not involve specific brands or channels.渠道。
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