Sep 2 | Jubo Info · Float Glass Market Review: Cold‑Repair vs Re‑ignition, The Prisoner’s Dilemma in the Glass Industry.

Production lines underwent successive cold repairs in June‑July, and the market was gripped by the narrative of “accelerating supply contraction”. However, August saw a wave of re‑ignitions. Multiple lines including Kibing Pinghu, Tianjin Yaopi and Shanxi Qingchun resumed production one after another. Within merely one month, market expectations for “supply contraction” were reversed. This supply‑side roller‑coaster of “cold repairs first, then re‑ignitions” reflects not only individual corporate operational decisions, but also the industry‑wide tough trade‑offs among losses, costs and market expectations.

I. Why Cold Repairs First: Forced Output Cuts Amid Sustained Losses

Persistent losses were the direct trigger for accelerated cold repairs in June‑July. Five lines entered cold repair in June, followed by seven more in July, marking the most intensive cold‑repair months of the year. By end‑July, float‑glass daily melting capacity fell to 142 000 tons from 146 000 tons, with the operating rate slipping to 66.21%.

The logic behind cold repairs is straightforward: prolonged losses. By mid‑August, natural‑gas‑fired lines posted average weekly losses of RMB 166‑196 per ton; coal‑gas‑fired lines lost RMB 52‑81 per ton; petroleum‑coke‑fired lines suffered losses of RMB 219‑222 per ton. The industry has remained in the red for more than eight consecutive months. Sustained losses are forcing high‑age, high‑cost kilns into water‑dump cold repairs. Longzhong Information commented: “Persistent industry losses are pushing high‑age and high‑cost kilns into cold repair.”

Notably, this round of cold repairs is no longer limited to outdated capacity. Among the 21 kilns taken offline since early this year, four had operated less than two years since last re‑ignition, fourteen ran for 2‑5 years, and only three exceeded five years of operation. Newer‑generation lines are also participating in supply clearance, indicating losses have evolved from partial squeeze to industry‑wide pressure.

II. Why Re‑ignition Then: Forced Restarts Despite Losses

Nevertheless, a seemingly contradictory phenomenon emerged in August: lines began concentrated re‑ignition even amid ongoing industry losses. Three lines have been re‑ignited since August, and the industry operating rate has bottomed out and rebounded.

Three underlying logics stand out:

First, constraints from cold‑repair duration and heat‑preservation costs. Float‑glass lines bear high cold‑repair expenses. Once cold‑repair tenure expires and heat‑retention costs surge, prolonged idling may cost more than restarting production. As observed by market institutions: “Glass manufacturers generally face tight finances. While cold‑repair expectations run high, actual implementation lags. Firms await cash‑flow turning points yet keep resumption plans on track.” Kilns cannot stay offline indefinitely. Tensions between financial strain and production continuity compel some producers to re‑ignite even at a loss.

Second, seasonal positioning for the traditional “Golden September & Silver October” peak. Some producers opt for early re‑ignition toward the end of the off‑season to capture demand recovery in the upcoming peak period. These three restarted lines are still in the kiln‑baking phase with no glass output yet, but signal rising supply in roughly the coming month. Without offsetting new cold repairs, daily output may climb to around 143 900 tons once these lines go into full production.

Third, market‑share defence. During industry downturns, shutdowns mean surrendering market share; resuming output serves to counter competitors’ expansion. Longzhong Information pointed out: “Increment from restarts keeps offsetting cold‑repair reductions. Net output cuts fall short of market expectations, and supply contraction proceeds moderately.” Even with losses, some firms keep running to retain clients and distribution channels, forming a Prisoner’s‑Dilemma‑style game equilibrium.

Meanwhile, cost gaps across fuel routes shape resumption rhythms. Coal‑gas‑fired lines maintain relatively high operating rates despite losses and constitute a major source of new supply. Lower‑cost lines restart first, consistent with market‑driven elimination logic: high‑cost capacity exits first while low‑cost capacity resumes later.

III. Up‑stream Resonance: No Monolithic Cost Base

Beneath shifts in glass production lines, profound changes are unfolding in raw‑material markets.

For soda ash, the market trended weak and volatile in August. As of August 24, total inventories at domestic soda‑ash producers stood at 1.87 million tons; North‑China heavy‑soda‑ash prices ranged RMB 1020‑1150 per ton. Soda‑ash futures retreated amid mild supply pressure and sluggish demand. Inventory pressure persists on the industrial chain amid rising supply and soft demand. Lower soda‑ash prices partially curb glass production costs yet weaken cost‑side support for glass prices. Glass buyers gain greater bargaining leverage, though falling soda‑ash prices leave limited further room for glass‑cost declines.

For petroleum coke, prices trended upward in August. The business‑society benchmark price hit RMB 3347 per ton on August 26, up 1.09% month‑to‑date. Low‑sulphur petroleum‑coke average prices rose to RMB 4741 per ton. Refinery‑produced petroleum‑coke showed mixed performance: Shandong refinery petroleum‑coke dropped 3.90% on August 21 versus August 17. Mild petroleum‑coke gains further squeezed margins for already‑loss‑making petroleum‑coke‑fired glass lines, explaining their deepest loss level of roughly RMB ‑219 to ‑222 per ton among three fuel routes.

For LNG, prices trended higher in August, mainly backed by cost drivers. The national average ex‑factory & terminal LNG price for August is estimated at RMB 5560 per ton. Tight feed‑gas supply and higher production costs bolster liquid‑gas plants’ price‑holding sentiment. Elevated LNG prices mean cost pressure for natural‑gas‑fired glass lines will hardly ease short‑term, one key factor behind widening losses for gas‑burning capacity.

The overall upstream landscape features weak soda ash, firm petroleum coke and high‑level LNG. Divergent cost movements across fuel routes amplify profit gaps within the glass sector and complicate corporate resumption decisions.

IV. Market Reaction: Sentiment Swings from Optimism to Anxiety

When cold repairs accelerated in July, the market held hopes for supply contraction. The August restart wave shattered such expectations. One institution noted: “Supply pressure resurges, with more planned re‑ignitions and decelerated cold repairs in August.” Longzhong Information judged: “This cold‑repair wave is largely over; market focus will shift back to demand recovery.”

Sentiment has swung from “anticipating cold repairs” to “fearing restarts”. This shift is directly reflected in futures: glass futures have come under sustained pressure since August, with core market logic shifting from “supply contraction” to “resumption pace”. Though restarted lines remain in kiln‑baking without finished‑glass output, they signal supply growth over the coming month.

V. Outlook: Can “Golden September & Silver October” Absorb New Supply?

The traditional peak “Golden September & Silver October” is approaching, yet demand has sent no clear signals by mid‑August.

As of August 13, total inventories at sampled domestic float‑glass producers reached 74.47 million weight boxes, still 17.41 % higher year‑on‑year. Completed housing floor space for Jan‑Jul fell 23.2 % year‑on‑year. Deep‑processing enterprises held order backlogs averaging 9.5 days; despite mild month‑on‑month improvement, absolute levels stay historically low. Meaningful demand recovery awaits tangible improvement in housing‑completion statistics and sustained terminal‑order expansion.

The tug‑of‑war between resumption speed and peak‑season strength will dominate near‑term price formation. While current daily melting capacity stands at 142 200 tons, new output from August’s concentrated re‑ignitions will gradually materialize in the coming month. Without offsetting additional cold repairs, supply will shift from contraction back toward expansion.

The upstream mix of weak soda ash, firm petroleum coke and high‑priced LNG creates marked gaps in resumption willingness and cost tolerance across fuel routes. Cost‑advantaged lines re‑ignite first while high‑cost capacity stays on hold — such divergence embodies spontaneous market adjustment under loss pressure.

Supply‑side pressure from slower cold repairs and faster restarts is locked in an uncertain tug‑of‑war against seasonal demand expectations for the "Golden September & Silver October". Will this period mark a bottom‑fighting rebound, or another dashed expectation? Around the Mid‑Autumn and National Day holidays, will prices hold or fall, and inventories build or draw down? Whether the market can emerge from its slump hinges on the strength of real demand recovery.

Data & Sources: Jubowang, Longzhong Information, Galaxy Futures, SDIC Futures, Minmetals Futures, etc.