Roland did not believe in evil, and continued to pull the cotton thread until he used seventy percent of his strength to barely break the cotton thread that looked slender and fragile.

"What a toughness!" Roland was amazed.

"The cotton thread soaked in star quality is super tough, and the tensile strength is 100 times stronger than that of ordinary cotton thread!" Duvalin said proudly.

Roland immediately thought of the chemical fiber on the earth, "This high-strength fiber is most suitable for making fishing line, even sharks don't want to break it." ”

The old dwarf tugged at the corners of his mouth and looked at him with contempt: "What, you only thought of using star fibers to make fishing lines?" That's too big a deal to do! ”

Roland was secretly ashamed and humbly asked: "Master Duvalin, what are the uses of this new type of fiber?" ”

"Look at this!" Duvalin bent down and pulled out a roll of gray fabric from the drawer and laid it flat on the table, "This is a thick cloth spun from ordinary cotton yarn, which has been fully soaked by the star, and the elasticity and toughness of the fibers have undergone a earth-shaking leap!" ”

Duvalin motioned for the two assistants to each grab a corner of the fabric and stretch it in midair. The old man picked up a dagger and stabbed it with all his might, and the tip of the knife stabbed the star-made fabric with a pop, but it did not penetrate the thin layer of cloth, which was like a super-tough rubber, first stretched into an umbrella, and then rebounded, forcing Duvalin to stagger back.

The old dwarf took a breath and handed the dagger to Roland, motioning for him to test the strength of the astral fabric himself.

Roland sliced the fabric with five points of force, the blade rustling against the fibers, but he couldn't cut it.

"This kind of star fiber is really tough and can effectively resist the puncture and cutting of sharp objects, which is most suitable for processing stab-proof clothing!" Roland finally thought of the correct use of the star fabric, and couldn't help but be overjoyed.

"We have tested the strength of the astral cloth, the defense against the piercing attack exceeds the leather armor, and the defense against the slash attack is not inferior to the chain mail, but the weight is only equivalent to a thick cotton vest, much lighter than the leather armor and chain mail, if the soldiers and police in the Far East can wear the star cloth armor, not only the defense is greatly improved, but the flexibility is a big advantage!" Duvalin said confidently.

"And how effective is it to resist blunt force blows?" Roland asked.

Duvalin shrugged, "Honestly, it's not better than ordinary leather armor, and there's no way around it, there's no perfect material in the world." ”

"It's really difficult for a stab-proof suit to have excellent blunt defense performance, but fortunately, blunt weapons are not mainstream weapons on the battlefield......," Roland touched his chin and groaned, "But there are still many issues to consider, such as whether the process of processing star cloth armor will be too complicated?" Will the cost be too high? ”

Duvalin shook his head with a smile: "Boil a big pot of star quality, and then throw the cotton shirt and underwear into it to soak it, this process can't be simpler, as for the cost, you can rest assured, cotton cloth is not valuable, and the consumption of star quality is also very small, according to my calculations, just make a carriage tire of star quality is enough to process 10 sets of star quality cloth armor, which is not much cheaper than chain mail!" ”

Luo Lan nodded again and again when he heard this, and planned to create a factory as soon as possible, using the star quality from the silver sky and the cotton cloth produced in southern Xinjiang as raw materials, batch processing star cloth armor, and changing the clothes of the Far East military police in batches.

"Your Highness Roland, my new invention is more than just star fiber, you can take a look at this again!" Duvalin excitedly pulled Roland to a two-foot-square wooden basin containing more than a foot of turbid liquid.

Roland leaned over to the tub and immediately smelled a familiar pungent smell, like an old, moldy newspaper.

"It's ...... Wood pulp for papermaking? ”

"That's right, it's the pulp from the paper mill next door, and then it's time to witness the miracle!"

Duvalin scooped a scoop of melted star from the crucible with a large ceramic spoon and poured it into a wooden basin filled with pulp. The alchemy assistant quickly followed and stirred the pulp.

Roland couldn't help but raise an eyebrow. Under his gaze, the pulp quickly fused with the astral substance, becoming a milky white compound similar to glue.

Seeing that the heat was almost up, Master Duvalin scooped up a spoonful of the mixture and poured it into the tubular abrasive that had been prepared, and then sprinkled in a handful of white mineral powder that resembled flour, and the mixture quickly solidified.

"This is soda ash?" Roland asked tentatively.

Duvalin patted his white powdered hand and nodded affirmatively.

"Your Highness, do you know what this astral colloid is for?"

"Hmm...... I can't see it yet. Roland told the truth.

The old dwarf smiled and pointed to the sink opposite the test table, "Your Highness, do you see that faucet?" The answer is there. ”

Roland stared at the faucet and fell into thought. Can astral colloids be used to make faucets? It doesn't seem to have much advantage over ironwork, what kind of dumb riddle did Master Duvalin play? He wasn't referring to the faucet, but to the ......

Roland suddenly had a flash of inspiration and blurted out: "Water pipe!" ”

"That's right!" The dwarf alchemy master smiled and applauded, "The mages of the ancient Arcane Empire often used lead to make water supply pipes, and later found that lead was toxic, so they switched to steel to make water pipes, but iron pipes are easy to rust, and the texture is too hard, it is inconvenient to extend and fold, and there are many inconveniences in use. ”

"If you use star colloids to make pipes, the cost is lower, it will not corrode, and it can be easily folded and extended, which perfectly replaces metal pipes!" Roland couldn't help but get excited, this is the plastic of the fantasy world, the protagonist of the new generation of material revolution!

"Hmm...... Frankly speaking, the cost of the star hose is not lower than that of the metal pipe, but the star hose also has a prominent advantage, the air tightness is better than the metal pipe, and it has incomparable advantages in the magic guide steam engine. Duvalin said with a fluttering eyebrow.

Roland listened to Master Duvalin's explanation, reached out to crush the clay grinding tool, took the milky white star hose in his hand and looked at it over and over again, and then twisted and bent it, and after letting go, the hose quickly returned to its original shape under the action of elasticity, both in appearance and texture it was very similar to the plastic hose on the earth.

Looking back at the history of the earth, in the early days of the industrial revolution, when there was no plastic, mechanical devices such as steam engines and water pumps could only be connected by copper pipes, and in that era when there was no welding technology, there were inevitably gaps in the interface of the pipe, and water leakage and deflating were inevitable, which greatly reduced the actual power of the machine, and backward materials and processes became the shortcomings that delayed technological progress, until the birth of rubber materials, this embarrassing situation was reversed.