Old Harden, can you handle having your vision-shifting abilities on all the time?
Chapter 18: Perfectly Repaired in One Day
Xu Xing did not continue working, but rested for a while and had a simple lunch.
At 12:30 pm, Xu Xing continued working.
First, fill the main creases with metal adhesive, then begin the most crucial step: glazing.
He took out the 7B test piece fired that morning. This was the piece with the best glaze color among the three test pieces. Under the dual inspection of standard light source and X-ray vision, the glaze color, luster and microstructure of the 7B test piece were astonishingly consistent with the glaze layer of the original piece.
Xu Xing re-mixed the 7B glaze with a special blending agent to create a glaze paste suitable for brush application.
He used the finest wolf-hair brush, dipped it in a very small amount of glaze, and began to repair the glaze on the worn-off adhesive areas.
The glaze must be applied very thinly, and each layer must be dried with a hot air gun at a low temperature before applying the next layer.
This process is repeated more than ten times until the thickness of the glaze layer is consistent with the surrounding original glaze surface before it is considered complete.
With the aid of X-ray vision, Xu Xing can precisely control the thickness of each layer, ensuring that the final glaze layer is neither too thick nor too thin.
After the glaze is repaired, a final firing is required to allow the new glaze to fuse with the original glaze surface.
Xu Xing placed a special high-temperature resistant alloy auxiliary fixing frame inside the gourd-shaped bottle, then put it into a small electric kiln, set the firing curve, and raised the temperature to 750°C at a rate of 5°C per minute, and held it for 10 minutes to allow the organic matter in the glaze to completely volatilize.
Then, the temperature is increased to 1050°C at a rate of 3°C per minute. This temperature is sufficient to melt the new glaze without affecting the repaired joints or the original porcelain glaze. Finally, the temperature is allowed to cool down naturally.
The entire firing process takes four hours.
During the wait, Xu Xing finally had time to rest.
He made himself a cup of tea and stood by the window gazing into the distance.
The skyline of Chang'an City gleamed golden in the afternoon sun, and this ancient capital was radiating new vitality.
Just like his life.
The electric kiln cooled down at 5 p.m.
Xu Xing put on thick, heat-resistant gloves and opened the kiln door. A wave of heat hit him, but he didn't care about that. His eyes were fixed on the gourd-shaped bottle inside the kiln.
When the gourd-shaped bottle was taken out and placed on the worktable, the light in the studio seemed to brighten up.
From the outside, it is a perfect work of art.
The 25-centimeter-tall gourd-shaped vase stood there dignifiedly, its celadon glaze as warm and lustrous as jade, and as clear and bright as the sky after rain.
The bottle's smooth curves taper naturally upwards from the bottom, flaring slightly outwards at the neck before ending in a rounded gourd-shaped mouth.
Xu Xing turned on the shadowless lamp and used a magnifying glass to examine every inch.
The newly applied glaze blends perfectly with the original glaze, and the boundary is not visible even under side lighting.
The glaze on the bottle is as smooth as ever, but the restoration work is not yet completely finished.
The remaining gaps in the repaired area, as well as the three punch lines, also need to be filled with epoxy resin.
Xu Xing began mixing the epoxy resin. Component A is the resin and component B is the curing agent. The mixing ratio of the two must be between 100:35 and 100:40. A deviation of more than 0.5% in the ratio will affect the strength and transparency after curing.
He took out a precision electronic scale, placed the glass slide on the scale pan, and zeroed it.
He first weighed 2.5 grams of component A resin, then switched to another glass slide and weighed 0.875 grams of component B curing agent.
This ratio has a relatively short curing time, approximately 4 hours for initial curing and 24 hours for complete curing, which suits his current need to see the bonding effect as soon as possible.
He transferred the two components to a glass plate and began to stir them slowly and evenly with a bamboo skewer.
Stirring must be done at a constant clockwise speed. It cannot be too fast, otherwise air bubbles will be mixed in, nor can it be too slow, resulting in uneven curing in some areas.
During the stirring process, Xu Xing quietly activated his X-ray vision.
His gaze pierced through the glass plate and the viscous resin mixture, revealing a microscopic world invisible to the naked eye.
In some areas, the mixture is not uniform enough, and the resin molecules and curing agent molecules have not been fully cross-linked.
Xu Xing adjusted the stirring speed and direction based on the microscopic structure he saw. With the help of his X-ray vision, he could accurately find areas where the mixture was uneven and use the tip of a bamboo skewer to stir them in a targeted manner.
Then, with the aid of X-ray vision and a microscope, epoxy resin was injected into the crack from the inside using special tools.
Finally, there is the thread repair, which is one of the most technically demanding steps in porcelain restoration.
A crack is a fissure inside a piece of porcelain. It may appear as just a thin line on the surface, but in reality, the crack inside the porcelain body may branch out like tree roots.
If not repaired properly, the cracks may continue to extend when the temperature and humidity change in the future, causing the porcelain to shatter completely.
Xu Xing placed the repaired gourd bottle on a specially made stand and turned on the fiber optic side light.
The three lines are clearly visible under side lighting.
He first dealt with the longest crack, which extended 8 centimeters from the cloud pattern on the bottle and almost ran through the entire belly.
Xu Xing took out a special low-viscosity epoxy resin. This resin has a viscosity that is only one-tenth that of ordinary repair glue, which allows it to penetrate micron-level cracks more effectively.
But he did not act immediately.
Instead, they first activated X-ray vision and carefully observed the internal condition of the piercing line with the aid of a microscope.
Through the glaze and porcelain body, Xu Xing saw a sight that made him frown.
This crease creates a complex branching structure inside the bottle, with the finest branch being only one-hundredth the thickness of a human hair.
Moreover, in the middle of the finish line, there is a 2-millimeter-long area where the ceramic bodies on both sides have slightly misaligned, forming a micron-level step.
If resin is poured directly, it may not be able to completely fill the finest branches, and the misaligned step could lead to stress concentration, becoming a potential future problem.
Xu Xing pondered for a moment and came up with a plan.
He first formulated a special medium-viscosity transition adhesive, which has poorer flowability than low-viscosity resin, but better gap-filling ability.
He used an extremely fine, curved injection needle to precisely inject the transition adhesive into the misaligned step area.
Under the monitoring of X-ray vision, he saw the glue gradually fill the gaps caused by the misalignment. After the glue initially cured, the area was reinforced and could withstand subsequent processing.
Next comes the main repair work for crossing the finish line.
Xu Xing took out a miniature vacuum injection device, which is a small transparent cover that can be attached above the punch line. By drawing a vacuum, low-viscosity resin can be automatically injected into the crack under negative pressure.
He aligned the transparent cover with the finish line and started the vacuum pump. The pressure gauge showed that the air pressure inside the cover dropped rapidly to 0.01 atmospheres.
Under this negative pressure environment, Xu Xing dripped low-viscosity epoxy resin onto the starting end of the rigging line.
The resin is immediately drawn into the crack and propagates forward along the rim at a visible speed.
With the aid of X-ray vision, Xu Xing could clearly see the flow of resin inside the cracks, and that the root-like branches were being filled one by one, with even the finest branches not being missed.
When the resin reaches the end of the punching line, Xu Xing immediately releases the vacuum to restore the air pressure to normal.
Atmospheric pressure forces the resin firmly into the crack, ensuring complete filling.
He immediately shone a UV lamp on the finish line area.
The specially formulated UV-curable epoxy resin can complete surface curing within 30 seconds under UV light with a wavelength of 365nm.
It took Xu Xing two full hours to finish processing the three finish lines.
Each step requires a separate vacuum chamber to precisely control the amount of resin used, monitor the filling process, and cure with ultraviolet light.
At 10:30 p.m., when the final rim was completed and solidified, President Xu breathed a long sigh of relief.
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